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Facebook Custom Anonymous Audience destination

Prerequisites for setting up Facebook Custom Anonymous Audience Loader

  1. The first step is to configure Meiro Events for Facebook Custom Anonymous Audience. You can refer to this article for guidance.
  2. Share your dataset with Meiro to generate an access token.
  3. Set up the loader within Meiro Integration.

After you finalize the first step, you can proceed with the following:

4. Set up the loader as a destination in CDP. This step is described below in this article.

5. Export segmented customer profiles to the destination. Described here.

    Setting up Facebook Custom Anonymous Audience destination in CDP

    The destination can be set in the Meiro Business Explorer in the Administration/Entities/Destination tab. The setup is usually done by the Meiro technical consultant.

    Destination ID

    (required, not editable)

    "The Destination ID" is a numeric value that analysts will refer to within the Meiro Integrations environment. After you choose the ID, it will not be possible to change it later on.

    Find the right workspace in Meiro Integrations, with  the CDP component responsible for the data load:


    Check Destination ID in Meiro Integrations:

    destination ID MI.png

    Insert Destination ID in the Meiro Business Explorer.


    Name (required)

    The name will be visible across the Meiro Business Explorer for the users (Data Library/ Destination tab, segment detail)

    Description (optional)

    It is possible to add a description to the destination. The description will be displayed for use in the Data Library/ Destination tab.



    The icon will be visible across the Meiro Business Explorer for the users (insights, Data Library/  Attributes, Sources and Destinations tabs,  segments, and customer profiles).

    Exported & Mandatory   attributes


    "Exported attributes" - values of exported attributes will be sent to the dedicated Meiro Integrations workspace, then to the destination.
    "Mandatory attributes" all customers in the export must have those attributes' values known.
    For this destination, both "exported attribute" and "mandatory attribute" are:

    • Fb client id

    Meiro Integrations


    "MI workspace" refers to the workspace in Meiro Integration, which will be executed when the segment is exported.

    To run exports, you need to know the name of the workspace. You should get the name of the respective workspace from the Meiro data analyst.

    Meiro data analyst takes care of the Meiro Integration's workspace preparation and data transformation for a specific destination (e.g., Facebook, Twitter, Google Analytics). Each destination requires a different (very specific) data structure.


    Audience Name


    Facebook Custom Anonymous Audience loader requires setting up an Audience Name parameter. 


    The audience name will be visible in the Facebook Business Manager (Meta Business Suite) under Settings > Add account settings > Select account > Event Manager > Meiro’s Pixel > Meiro Segment >View Detail > Recent Activity > URL and it will be referred to when setting up audiences in the Audiences section.

    audience name facebook audience.png 

    Meiro Integrations Key (required):  audience_name

    It is set up by analysts and needs to be the same key as in workspace variables in Meiro Integrations.


    Name (required): Audience Name

    The name will be displayed for the user in the segments export parameter section.


    Required field (checkbox): ticked

    This field is required to be filled in to export to Facebook.


    Value from the list (checkbox): not ticked

    Ticked makes a possible selection from the value drop-down list. Unticked disables drop-down list.


    User input (checkbox):  ticked

    This field is required to be filled in to export to Facebook.




    Example: As in the screenshot above, "audience_name" will refer to the Meiro Integrations workspace, while for business users in Meiro Business Explorer, this field will be visible as "Audience name." It will be a required field, without drop-down and user input required.

    Remember: Facebook Custom Anonymous Audience loader does not require: "Audience ID", nor "Retention days" as Facebook Audience loader. It is because the Facebook Custom Anonymous Audience loader updated Facebook Pixel events, not Facebook Audiences. It is possible to create an audience out of Facebook Pixel. In this case, "Retention days" can be set in the Facebook environment.

    Export to Facebook Pixels in Business Manager (Meta Business Suite)

    Export audiences segmented in Meiro Business Explorer to Facebook Business Manager (Meta Business Suite), then to  Facebook Pixels. Create custom anonymous audiences from Facebook Pixels to target audiences further through Facebook Ads. Check the results of your campaign back in Meiro (segment customers you sent the campaign to and check its insights and customer profiles).

    Exports tab setting

    After segmenting the audience, go to the Exports section, where you should be able to find to which destination it is currently possible to export the segment (It is possible to set more exports, but it requires the help of the Meiro team).

    Знімок екрана 2024-01-18 о 10.04.50.png


    Exportable shows how many customer profiles will be exported to your destination.

    This number is defined by the conditions you choose to segment the audience and mandatory attributes set up by the administrator (that must be present to export to your destination).

    For example, if you segment 1000 profiles, but only 10 have mandatory attributes present, only those ten will be exported to your destination.

    Mandatory attributes are visible in the Data Library/ Destinations tab.

    For exports to Facebook Pixels, the mandatory attribute is: "FB Cookie ID." Customers who we do not know the “FB Cookie ID” for, will not be exported to Facebook Pixel.

    Warning: It may happen that the size of your Custom Audience may be very low, while the size of the exportable audience from the Meiro is high. To understand more about the reasons for the low matching rate, please get acquainted with the primary article from Meta.


    Знімок екрана 2024-01-18 о 11.21.15.png


    Audience Name (required)

    The audience name inserted here will be visible in the Facebook Business Manager (Meta Business Suite)/ Facebook Pixel section described below in point 4.

    Remember: "Audience name" from Facebook Pixel, will be referred to when setting up audiences in the Audiences section of Facebook Business Manager described below.

    Warning: "Audience name" in the context of Facebook Pixel is different from "Audience name" in Facebook audiences. In Facebook Pixel it is visible in the URL address visible above, in Facebook Audiences, it refers to the name of the audience.

    Facebook environment

    Exports from Meiro will be visible in Facebook Business Manager (Meta Business Suite) under Settings:

    Знімок екрана 2023-11-22 о 12.07.42.png

    > Go to 'Ad account settings'

    Знімок екрана 2023-11-22 о 11.21.39.png

    > Select account from the dropdown

    Знімок екрана 2023-11-22 о 11.26.42.png

    > go to Event Manager under the All tools tab

    Знімок екрана 2023-11-21 о 16.07.46.png

    > Select Meiro’s Pixel

    Знімок екрана 2023-11-22 о 11.34.01.png

    > Locate "Meiro Segment" events (1), expand them, and click the 'View Details' button

    Remember: exports from Meiro will be all visible under the same event "Meiro Segment."

    Знімок екрана 2023-11-22 о 11.43.41.png

    > Go to Sampled Activities 

    Знімок екрана 2023-11-22 о 11.54.33.png

    > In the "Sampled Activities," each exported event is visible, as well as the URL with the "segment ID," which can be used to create an audience on Facebook.

    Create a Facebook audience with exports from Facebook Pixels

    To create a Facebook audience from Facebook Pixels, go to Audiences under the All tool tab:

    Знімок екрана 2023-11-22 о 11.41.17.png

    Select an audience you wish to update or create a new audience and fill out the fields:

    1. Source: Meiro Pixel.
    2. Events: Meiro Segments.
    3. Retention: (optional)
    4. Select URL/Parameter in the dropdown "Refined by."
    5. URL: insert Segment ID (retrieve from Facebook Pixel Sampled Activities > URL). Example: For URL https://www.meiro.io/MeiroSegment-42/audience_name-my audience, you should insert MeiroSegment-42.
    6. Give a name to the audience. 
    7. Create an audience.

    Screenshot 2023-02-20 at 10.11.02.png


    How long does matching between exports from Meiro and Facebook take?

    Depending on the size of the exported audience, matching can take anything from minutes to single-digit hours. 

    Updating with Facebook's interface can take 2-3 days, though. 

    If you have any doubts, please check with the Meiro team. 

    Will Facebook Audience be updated automatically when I schedule export regularly from Meiro to Facebook Pixel? Yes, the audience created from Facebook Pixel should be updated automatically by Facebook.
    Will the upload of the events be incremental or overwrite existing audiences?

    The load of the events is incremental to the same "segment ID." Please note that the cookie will be in the Facebook Ads Audience for the number of days defined while creating the audience on Facebook since the last event sent for this cookie.

    retention days.png

    What is the difference between FB custom and anonymous audience?

    FB Custom Audience allows you to define an audience based on criteria such as CDP, but the audience can be identified through their name, email, or phone number.


    FB Anonymous Custom Audience, the audience is defined but not identified, meaning that the audience does not have a name, email, or phone number. Instead, we retarget them based on their FB client ID.