Pixel for the Marketing API

The Facebook Pixel is the main tool you can use to track events on a website. You can then use data from the pixel with Marketing API to:

Build custom audiences based on activity on your website
Measure conversion activity and determine which ads lead to results such as purchases

iOS 14.5 Updates

Due to the changes for iOS 14.5, we have introduced a new tool for tracking web events for iOS 14.5 ad campaigns.

Aggregated Event Measurement

Facebook’s Aggregated Event Measurement is a protocol that allows for measurement of web events from iOS 14.5 users. Aggregated Event Measurement limits domains to 8 conversion events that can be used for campaign optimization.

Visit our Domain Verification guide to verify your domain ownership for Aggregated Event Measurement.

Visit our Business Help Center to learn more.

Visit our Changelog for more information about other changes available.

Get the Pixel Code

Visit our Pixel Implementation guide to learn how to:

Create a pixel using Ads Manager
Get the base code for your pixel
Install the base code on your website

Image Only Pixel Code

We strongly recommend using the JavaScript code for Facebook Pixel. However, in some cases, you may use an HTML or an image pixel then add another third party tag from your website. The image pixel looks like this:

<img src="https://www.facebook.com/tr?id=<PIXEL_ID>&amp;ev=PageView&amp;noscript=1" height="1" width="1" style="display:none"/>

Replace <PIXEL_ID> with your Facebook pixel ID

Pixel Tracking

Track different pixels by providing the pixel id in an ad's tracking specs. For tracking conversions, set tracking specs to:

// tracking spec to match website actions from Facebook pixel
{"action.type":["offsite_conversion"],"fb_pixel":[<fb_pixel_id>]}

This tracks the performance and activity for all standard events. To track a Facebook pixel without optimizing for conversion, set tracking_specs at the ad level:

use FacebookAds\Object\Ad;
use FacebookAds\Object\Fields\AdFields;

$ad = new Ad(null, 'act_<AD_ACCOUNT_ID>');
$ad->setData(array(
  AdFields::ADSET_ID => <AD_SET_ID>,
  AdFields::CREATIVE => array(
    'creative_id' => <CREATIVE_ID>,
  ),
  AdFields::NAME => 'Offsite Conversions Ad',
  AdFields::TRACKING_SPECS => array(array(
    'action.type' => 'offsite_conversion',
    'fb_pixel' => <PIXEL_ID>,
  )),
));

$ad->create();

from facebookads.adobjects.ad import Ad

ad = Ad(parent_id='act_<AD_ACCOUNT_ID>')
ad.update({
    Ad.Field.adset_id: <AD_SET_ID>,
    Ad.Field.name: 'Offsite Conversions Ad',
    Ad.Field.creative: {
        'creative_id': <CREATIVE_ID>,
    },
    Ad.Field.tracking_specs: [
        {
            'action.type': 'offsite_conversion',
            'fb_pixel': <PIXEL_ID>,
        },
    ],
})
ad.remote_create(params={
    'status': Ad.Status.paused,
})

Ad ad = new AdAccount(act_<AD_ACCOUNT_ID>, context).createAd()
  .setAdsetId(<AD_SET_ID>)
  .setCreative(
    new AdCreative()
      .setFieldId(<CREATIVE_ID>)
  )
  .setName("Offsite Conversions Ad")
  .setTrackingSpecs("{\"action.type\":\"offsite_conversion\",\"fb_pixel\":\"" + <PIXEL_ID> + "\"}")
  .execute();
String ad_id = ad.getId();

curl \
  -F 'adset_id=<AD_SET_ID>' \
  -F 'creative={"creative_id":"<CREATIVE_ID>"}' \
  -F 'name=Offsite Conversions Ad' \
  -F 'tracking_specs=[{"action.type":"offsite_conversion","fb_pixel":"<PIXEL_ID>"}]' \
  -F 'access_token=<ACCESS_TOKEN>' \
  https://graph.facebook.com/v2.11/act_<AD_ACCOUNT_ID>/ads

To install your pixel, see Facebook Pixel, Using the Pixel. After you confirm the pixel and standard events work, remove existing Conversion Tracking pixels and Custom Audience pixels from your website.

Add Advanced Matching

You can send additional customer data through the pixel and match more website actions with people on Facebook. See Advanced Matching.

Reporting Events

Reporting ViewContent standard event with parameters

fbq('track', 'ViewContent', { 
content_type: 'product',
content_ids: ['1234'],
content_name: 'ABC Leather Sandal',
content_category: 'Shoes'
value: 0.50,
currency: 'USD'
});

Reporting ViewContent with the img pixel

<img src="https://www.facebook.com/tr?id=<PIXEL_ID>&amp;ev=ViewContent&amp;cd[content_name]=ABC%20Leather%20Sandal&amp;cd[content_category]=Shoes&amp;cd[content_type]=product&amp;cd[content_ids]=1234&amp;cd[value]=0.50&amp;cd[currency]=USD&amp;noscript=1" height="1" width="1" style="display:none"/>

Reporting Purchase with additional product information

fbq('track', 'Purchase', { 
content_type: 'product',
contents: [
{
'id': '1234',
'quantity': 2,
},
{
'id': '4642',
'quantity': 1,
}
],
value: 25.00,
currency: 'USD'
});

Report a Search event

fbq('track', 'Search', { 
search_string: 'leather sandals',
content_category: 'Product Search',
content_ids: ['1234', '2424', '1318', '6832'],
value: 0.50,
currency: 'USD'
});

Report a Lead event

fbq('track', 'Lead', {
content_name: 'Auto Insurance',
content_category: 'Quote',
value: 40.00,
currency: 'USD'
});

Report a custom event

fbq('trackCustom', '<CustomEventName>', {
custom_param1: 'ABC',
custom_param2: 123,
value: 10.00,
currency: 'USD'
});

Report a custom event from a specific pixel. The trackSingleCustom method does not validate custom data.

<script>
function onClick() {
fbq('trackSingleCustom', '<PIXEL_ID>', 'PageView');
};
</script>

Report a custom event via img pixel

<img src="https://www.facebook.com/tr?id=<PIXEL_ID>&amp;ev=CustomEventName&amp;cd[custom_param1]=ABC&amp;cd[custom_param2]=123&amp;cd[value]=10.00&amp;cd[currency]=USD&amp;noscript=1" height="1" width="1" style="display:none"/>

To suppress pixel being fired via pushState or replaceState:

fbq.disablePushState = true;

Track In-Page Events

After you install the pixel track in-page actions, such as product purchases, by tying events to HTML elements such as buttons. For example:

<button onClick="fbq('track', 'Purchase');">Button Text</button>

Or you could create a function that pushes the event. The advantage is if you have multiple HTML elements, you can call a single function when someone clicks any of them; you don't have to define individual onClick element.

For example, to push the event:

<script>
function onClick() {
fbq('track', 'Purchase');
};
</script>

You can call this function to fire Purchase events from multiple HTML elements. For example:

<button onClick="onClick()">Buy Now</button>

<button onClick="onClick()">Buy as a Gift</button>

Note: Pixel Helper may show multiple pixel events firing from the same page. The Pixel Helper expects pages to fire only on load but by tying events to elements, such as a button, you are using an alternative solution that overturns the expected behavior.

Optimizations

Optimize for Conversions

To optimize ad delivery for conversions based on standard events:

Define it in promoted_object on the ad set.
Specify pixel id and the pixel event you want to optimize for. Once you set the promoted_object, conversion_specs are automatically inferred based on the objective and promoted_object. You cannot manually set conversion_specs:

// optimize for Purchase standard event.
"promoted_object" : {'pixel_id':<FB_PIXEL_ID>, 'custom_event_type':'PURCHASE'}

See the list of standard events where custom_event_type can have values, depending on the standard event.

To create an oCPM adset optimizing for Purchase events:

use FacebookAds\Object\AdSet;
use FacebookAds\Object\Fields\AdSetFields;
use FacebookAds\Object\Fields\TargetingFields;
use FacebookAds\Object\Values\AdSetBillingEventValues;
use FacebookAds\Object\Targeting;
use FacebookAds\Object\Values\AdSetOptimizationGoalValues;

$adset = new AdSet(null, 'act_<AD_ACCOUNT_ID>');
$adset->setData(array(
  AdSetFields::NAME => 'Ad Set oCPM',
  AdSetFields::BID_AMOUNT => 150,
  AdSetFields::BILLING_EVENT => AdSetBillingEventValues::IMPRESSIONS,
  AdSetFields::OPTIMIZATION_GOAL =>
    AdSetOptimizationGoalValues::OFFSITE_CONVERSIONS,
  AdSetFields::PROMOTED_OBJECT => array(
    'pixel_id' => <PIXEL_ID>,
    'custom_event_type' => 'PURCHASE',
  ),
  AdSetFields::DAILY_BUDGET => 1000,
  AdSetFields::CAMPAIGN_ID => <CAMPAIGN_ID>,
  AdSetFields::TARGETING => (new Targeting())->setData(array(
    TargetingFields::GEO_LOCATIONS => array(
      'countries' => array('US'),
    ),
  )),
));
$adset->create(array(
  AdSet::STATUS_PARAM_NAME => AdSet::STATUS_PAUSED,
));

from facebookads.adobjects.adset import AdSet
from facebookads.adobjects.targeting import Targeting

adset = AdSet(parent_id='act_<AD_ACCOUNT_ID>')
adset.update({
    AdSet.Field.name: 'Ad Set oCPM',
    AdSet.Field.bid_amount: 150,
    AdSet.Field.billing_event: AdSet.BillingEvent.impressions,
    AdSet.Field.optimization_goal: AdSet.OptimizationGoal.offsite_conversions,
    AdSet.Field.promoted_object: {
        'pixel_id': <PIXEL_ID>,
        'custom_event_type': 'PURCHASE',
    },
    AdSet.Field.daily_budget: 1000,
    AdSet.Field.campaign_id: <CAMPAIGN_ID>,
    AdSet.Field.targeting: {
        Targeting.Field.geo_locations: {
            'countries': ['US'],
        },
    },
})

adset.remote_create(params={
    'status': AdSet.Status.paused,
})
print(adset)

AdSet adSet = new AdAccount(act_<AD_ACCOUNT_ID>, context).createAdSet()
  .setName("Ad Set oCPM")
  .setBidAmount(150L)
  .setBillingEvent(AdSet.EnumBillingEvent.VALUE_IMPRESSIONS)
  .setOptimizationGoal(AdSet.EnumOptimizationGoal.VALUE_OFFSITE_CONVERSIONS)
  .setPromotedObject("{\"pixel_id\":\"" + <PIXEL_ID> + "\",\"custom_event_type\":\"PURCHASE\"}")
  .setDailyBudget(1000L)
  .setCampaignId(<CAMPAIGN_ID>)
  .setTargeting(
    new Targeting()
      .setFieldGeoLocations(
        new TargetingGeoLocation()
          .setFieldCountries(Arrays.asList("US"))
      )
  )
  .setStatus(AdSet.EnumStatus.VALUE_PAUSED)
  .execute();
String ad_set_id = adSet.getId();

curl \
  -F 'name=Ad Set oCPM' \
  -F 'bid_amount=150' \
  -F 'billing_event=IMPRESSIONS' \
  -F 'optimization_goal=OFFSITE_CONVERSIONS' \
  -F 'promoted_object={"pixel_id":"<PIXEL_ID>","custom_event_type":"PURCHASE"}' \
  -F 'daily_budget=1000' \
  -F 'campaign_id=<CAMPAIGN_ID>' \
  -F 'targeting={"geo_locations":{"countries":["US"]}}' \
  -F 'status=PAUSED' \
  -F 'access_token=<ACCESS_TOKEN>' \
  https://graph.facebook.com/v2.11/act_<AD_ACCOUNT_ID>/adsets

Optimize for Purchase Value

Optimize the delivery of your ads based on a valued goal, such as purchase value, if you configure your pixel to send purchase values. To use value optimization:

Optimization Goal—Set to VALUE.
Billing Event—Set to IMPRESSIONS.
Promoted Object—Set custom_event_type to PURCHASE.
Bid Amount—Set is_autobid to true.
Attribution Window—7-day or 1-day.

Example:

curl \
  -F 'name=Ad Set Value Optimization' \
  -F 'is_autobid=true' \
  -F 'billing_event=IMPRESSIONS' \
  -F 'optimization_goal=VALUE' \
  -F 'promoted_object={"pixel_id":"<PIXEL_ID>","custom_event_type":"PURCHASE"}' \
  -F 'daily_budget=1000' \
  -F 'campaign_id=<CAMPAIGN_ID>' \
  -F "attribution_spec=[{'event_type': 'CLICK_THROUGH', 'window_days':'1'}]" \
  -F 'targeting={"geo_locations":{"countries":["US"]}}' \
  -F 'status=PAUSED' \
  -F 'access_token=<ACCESS_TOKEN>' \
  https://graph.facebook.com/v2.10/act_<AD_ACCOUNT_ID>/adsets

Sharing Pixel

You can share your Facebook pixel with your own ad accounts and with other businesses via Business Manager. You must be an admin of the business. To share a pixel:


curl -X POST \
  -F 'account_id=null' \
  -F 'business=null' \
  -F 'access_token=<ACCESS_TOKEN>' \
  https://graph.facebook.com/v12.0/{pixel-id}/shared_accounts


'use strict';
const bizSdk = require('facebook-nodejs-business-sdk');
const AdsPixel = bizSdk.AdsPixel;

const access_token = '<ACCESS_TOKEN>';
const app_secret = '<APP_SECRET>';
const app_id = '<APP_ID>';
const id = '<PIXEL_ID>';
const api = bizSdk.FacebookAdsApi.init(access_token);
const showDebugingInfo = true; // Setting this to true shows more debugging info.
if (showDebugingInfo) {
  api.setDebug(true);
}

const logApiCallResult = (apiCallName, data) => {
  console.log(apiCallName);
  if (showDebugingInfo) {
    console.log('Data:' + JSON.stringify(data));
  }
};

let fields, params;
fields = [
];
params = {
  'account_id' : '<adAccountID>',
  'business' : '<businessID>',
};
const shared_accounts = (new AdsPixel(id)).createSharedAccount(
  fields,
  params
);
logApiCallResult('shared_accounts api call complete.', shared_accounts);


require __DIR__ . '/vendor/autoload.php';

use FacebookAds\Object\AdsPixel;
use FacebookAds\Api;
use FacebookAds\Logger\CurlLogger;

$access_token = '<ACCESS_TOKEN>';
$app_secret = '<APP_SECRET>';
$app_id = '<APP_ID>';
$id = '<PIXEL_ID>';

$api = Api::init($app_id, $app_secret, $access_token);
$api->setLogger(new CurlLogger());

$fields = array(
);
$params = array(
  'account_id' => '<adAccountID>',
  'business' => '<businessID>',
);
echo json_encode((new AdsPixel($id))->createSharedAccount(
  $fields,
  $params
)->exportAllData(), JSON_PRETTY_PRINT);


from facebook_business.adobjects.adspixel import AdsPixel
from facebook_business.api import FacebookAdsApi

access_token = '<ACCESS_TOKEN>'
app_secret = '<APP_SECRET>'
app_id = '<APP_ID>'
id = '<PIXEL_ID>'
FacebookAdsApi.init(access_token=access_token)

fields = [
]
params = {
  'account_id': '<adAccountID>',
  'business': '<businessID>',
}
print AdsPixel(id).create_shared_account(
  fields=fields,
  params=params,
)


import com.facebook.ads.sdk.*;
import java.io.File;
import java.util.Arrays;

public class SAMPLE_CODE_EXAMPLE {
  public static void main (String args[]) throws APIException {

    String access_token = \"<ACCESS_TOKEN>\";
    String app_secret = \"<APP_SECRET>\";
    String app_id = \"<APP_ID>\";
    String id = \"<PIXEL_ID>\";
    APIContext context = new APIContext(access_token).enableDebug(true);

    new AdsPixel(id, context).createSharedAccount()
      .setAccountId(\"<adAccountID>\")
      .setBusiness(\"<businessID>\")
      .execute();

  }
}


require 'facebook_ads'

access_token = '<ACCESS_TOKEN>'
app_secret = '<APP_SECRET>'
app_id = '<APP_ID>'
id = '<PIXEL_ID>'

FacebookAds.configure do |config|
  config.access_token = access_token
  config.app_secret = app_secret
end

ads_pixel = FacebookAds::AdsPixel.get(id)
shared_accounts = ads_pixel.shared_accounts.create({
    account_id: '<adAccountID>',
    business: '<businessID>',
})

To list your own ad accounts your pixel is shared with:

use FacebookAds\Object\AdsPixel;

$pixel = new AdsPixel(<PIXEL_ID>, $ad_account_id);

$shared_accounts = $pixel->getSharedAccounts(
  array(),
  array(
    'business' => '<BUSINESS_ID>',
  ));
foreach ($shared_accounts as $shared_account) {
  echo $shared_account->{AdAccountFields::ID}.PHP_EOL;
}

from facebookads.adobjects.adspixel import AdsPixel
from facebookads.adobjects.adaccount import AdAccount

pixel = AdsPixel(<PIXEL_ID>)
shared_accounts = pixel.get_ad_accounts('<BUSINESS_ID>')
for shared_account in shared_accounts:
    print(shared_account[AdAccount.Field.id])

APINodeList<AdAccount> adAccounts = new AdsPixel(<PIXEL_ID>, context).getSharedAccounts()
  .setBusiness(<BUSINESS_ID>)
  .execute();

curl -G \
  -d 'business=<BUSINESS_ID>' \
  -d 'access_token=<ACCESS_TOKEN>' \
  https://graph.facebook.com/v2.11/<PIXEL_ID>/shared_accounts

To unshare a pixel:

use FacebookAds\Object\AdsPixel;

$pixel = new AdsPixel(<PIXEL_ID>);
// ad account id without 'act_'
$pixel->unsharePixelWithAdAccount(<BUSINESS_ID>, <ACCOUNT_ID>);

from facebookads.adobjects.adspixel import AdsPixel

pixel = AdsPixel(<PIXEL_ID>)
pixel.unshare_pixel_from_ad_account(<BUSINESS_ID>, <ACCOUNT_ID>)

curl -X DELETE \
  -d 'business=<BUSINESS_ID>' \
  -d 'account_id=<ACCOUNT_ID>' \
  -d 'access_token=<ACCESS_TOKEN>' \
  https://graph.facebook.com/v2.11/<PIXEL_ID>/shared_accounts

To list ad accounts that a business assigned to your pixel:

use FacebookAds\Object\AdsPixel;

$pixel = new AdsPixel(<PIXEL_ID>, $ad_account_id);

$shared_accounts = $pixel->getSharedAccounts(
  array(),
  array(
    'business' => '<BUSINESS_ID>',
  ));
foreach ($shared_accounts as $shared_account) {
  echo $shared_account->{AdAccountFields::ID}.PHP_EOL;
}

from facebookads.adobjects.adspixel import AdsPixel
from facebookads.adobjects.adaccount import AdAccount

pixel = AdsPixel(<PIXEL_ID>)
shared_accounts = pixel.get_ad_accounts('<BUSINESS_ID>')
for shared_account in shared_accounts:
    print(shared_account[AdAccount.Field.id])

APINodeList<AdAccount> adAccounts = new AdsPixel(<PIXEL_ID>, context).getSharedAccounts()
  .setBusiness(<BUSINESS_ID>)
  .execute();

curl -G \
  -d 'business=<BUSINESS_ID>' \
  -d 'access_token=<ACCESS_TOKEN>' \
  https://graph.facebook.com/v2.11/<PIXEL_ID>/shared_accounts

Pixel Statistics

Use Pixel Stats edge for more information. To read custom data stats for 'product_info', between two UNIX timestamps:

use FacebookAds\Object\AdsPixel;

$pixel = new AdsPixel(<PIXEL_ID>);
$pixel->getStats(array(), array(
  'aggregation' => 'custom_data_field',
  'event' => 'product_info',
  'start_time' => (new \DateTime("-1 week"))->getTimestamp(),
  'end_time' => (new \DateTime("now"))->getTimestamp(),
));

from facebookads.adobjects.adspixel import AdsPixel
import time

pixel = AdsPixel(<PIXEL_ID>)
pixel.get_stats(params={
    'aggregation': 'custom_data_field',
    'event': 'product_info',
    'start_time': int(time.time()) - 3600 * 24 * 7,
    'end_time': int(time.time()),
})

APINodeList<AdsPixelStatsResult> adsPixelStatsResults = new AdsPixel(<PIXEL_ID>, context).getStats()
  .setAggregation(AdsPixelStatsResult.EnumAggregation.VALUE_CUSTOM_DATA_FIELD)
  .setEvent("product_info")
  .setStartTime(start_time)
  .setEndTime("1469739348")
  .execute();

curl -G \
  -d 'aggregation=custom_data_field' \
  -d 'event=product_info' \
  -d 'start_time=1516682708' \
  -d 'end_time=1517287508' \
  -d 'access_token=<ACCESS_TOKEN>' \
  https://graph.facebook.com/v2.11/<PIXEL_ID>/stats

The response:

"data": [
    {
      "aggregation": "custom_data_field", 
      "timestamp": "2014-06-16T13:00:00", 
      "data": [
        {
          "value": "product", 
          "count": 3212
        }, 
        {
          "value": "price", 
          "count": 3212
        }, 
        {
          "value": "sale", 
          "count": 12
        }
     ]
    }, 
    {
      "aggregation": "custom_data_field", 
      "timestamp": "2014-06-16T14:00:00", 
      "data": [
        {
          "value": "product", 
          "count": 1232
        }, 
        {
          "value": "price", 
          "count": 1232
        },
         {
          "value": "sale", 
          "count": 321
        }
     ]
        ...

To read device type stats for the past 24 hours:

use FacebookAds\Object\AdsPixel;

$pixel = new AdsPixel(<PIXEL_ID>);
$pixel->getStats(array(), array(
  'aggregation' => 'device_type',
));

from facebookads.adobjects.adspixel import AdsPixel

pixel = AdsPixel(<PIXEL_ID>)
pixel.get_stats(params={
    'aggregation': 'device_type',
})

APINodeList<AdsPixelStatsResult> adsPixelStatsResults = new AdsPixel(<PIXEL_ID>, context).getStats()
  .setAggregation(AdsPixelStatsResult.EnumAggregation.VALUE_DEVICE_TYPE)
  .execute();

curl -G \
  -d 'aggregation=device_type' \
  -d 'access_token=<ACCESS_TOKEN>' \
  https://graph.facebook.com/v2.11/<PIXEL_ID>/stats

The response:

"data": [
    {
      "aggregation": "device_type", 
      "timestamp": "2014-07-17T18:00:00", 
      "data": [
        {
          "value": "desktop", 
          "count": 208883
        }, 
        {
          "value": "mobile_iphone", 
          "count": 61754
        }, 
        {
          "value": "mobile_android_phone", 
          "count": 56152
        }, 
        {
          "value": "mobile_ipad", 
          "count": 49282
        }, 
        {
          "value": "mobile_android_tablet", 
          "count": 8382
        }, 
        {
          "value": "mobile_windows_phone", 
          "count": 1570
        }, 
        {
          "value": "mobile_ipod", 
          "count": 428
        }, 
        ...

To read the browser type stats for the past 24 hours:

curl \
-D 'access_token=__ACCESS_TOKEN__' \
-D 'aggregation=browser_type' \
'https://graph.facebook.com/<API_VERSION>/<pixel_id>/stats'

The response:

"data": [
    {
      "aggregation": "browser_type", 
      "timestamp": "2014-07-17T18:00:00", 
      "data": [
        {
          "value": "Chrome 39", 
          "count": 61507
        }, 
        {
          "value": "Firefox 35", 
          "count": 12879
        }, 
        {
          "value": "IE 10", 
          "count": 6677
        }, 
        {
          "value": "Chrome 37", 
          "count": 6662
        }, 
        {
          "value": "Safari 8", 
          "count": 3663
        }, 
        ...

Terms of Service

You can use Marketing API to accept and check Facebook's Terms of Service for Custom Audiences, Moble Custom Audiences, Website Custom Audiences, and legacy Conversion Pixels. This API is currently under limited availability. Contact your Facebook Representative for access.

To check if your ad account can accept the Terms of Service via API, make a GET to: ad_account_ID/customaudiencestos

In the reponse, check the type: custom_audience and type: web_custom_audience fields. To accept the Terms of Service for an ad account make a POST request. To do this you need to be an ad account admininistrator or advertiser with ['MANAGE', 'ADVERTISE'] roles, not just an analyst. See Business Manager API, Permitted Roles. For example:

ad_account_ID/customaudiencestos?tos_id=custom_audience_tos

or:

ad_account_ID/customaudiencestos?tos_id=web_custom_audience_tos

To see if an ad account accepted the terms, make a GET to:

ad_account_id? fields=tos_accepted

In the response check to see if it contains custom_audience_tos, web_custom_audience_tos, or similar:

{
  "tos_accepted": {
    "web_custom_audience_tos": 1,
    "custom_audience_tos": 1
  },
  "id": “act_xxxxxxxxxxxx"
}

Related Resources

Conversion Tracking and Pixel Stats - Track and optimize for conversions.
Custom Audiences - Create Website Custom Audiences with people who visited or took specific actions on your website.
Facebook Pixel, Standard and Custom Events - Default events tracked by the pixel, and custom events you can add.