> ## Knowledge Base Index > Fetch the complete knowledge base index at: https://socialhead.crisp.help/sitemap.xml > Use this file to discover available pages before exploring further. > Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash). # How to set up the supplementary feed? Supplementary feed is a feature of Facebook that allows users to enhance their Facebook catalog with additional product attributes. It supplements the product information provided in another data feed, enabling users to add or update certain fields for existing items in their catalog. ### Table of Contents 1. [Why Use a Supplementary Feed?](#1-why-use-a-supplementary-feed) 2. [When to Use a Supplementary Feed](#1-when-to-use-a-supplementary-feed) 3. [ How to Create a Supplementary Feed](#1-how-to-create-a-supplementary-feed) * Creating a Supplementary Feed * Editing Item ID in the Supplementary Feed * Editing Enhanced Fields --- # Why Use a Supplementary Feed? If the primary feed only provides basic fields and does not include enhanced fields such as color, size, gender, age group, or custom fields, a supplementary feed can be used to add those fields. Additionally, it allows users to overwrite certain information declared in the primary feed. For more details on basic and enhanced fields, refer to [this article](https://www.facebook.com/business/help/120325381656392?id=725943027795860). # When to Use a Supplementary Feed If you have created a Facebook feed (primary feed) using our app, there is no need to create a supplementary feed, as the Facebook feed generated by our app includes all basic and enhanced fields. However, if you have created a Facebook feed using another app that does not provide the necessary fields, you can use our app to create a supplementary feed. # How to Create a Supplementary Feed 1. **Create a supplementary feed** * Please go to the **Feed Center** > **Supplementary Feed** tab > click the **Create supplementary Feed** button > **Connect with Facebook Catalog** > Log into **your Facebook Business account** and grant our app permission stated within the pop-up ![](https://storage.crisp.chat/users/helpdesk/website/-/c/b/9/2/cb92164b6e8ef000/image_z4lytk.png) * Then, you will be taken to the **Create Feed** page. You need to input the **Feed Name**, choose your **Facebook Business Account**, the **Catalog ID** and **Primary feed linked**. ||| *Please note: Select an available Primary Feed that has not been connected to any other Supplementary Feed yet* * Next, choose the **Product Source** (the store) you want to sync product from. If you have more than one store, you can choose more than one source. * Finally, you can also choose the exact product to be included in your feed using Product Filter. You can either [include products manually by inserting their IDs or set up rules to filter specific product groups](https://socialhead.crisp.help/en/article/how-to-manage-your-feed-include-specific-collectionsproducts-schedule-submit-frequency-2toc5y/). ![](https://storage.crisp.chat/users/helpdesk/website/-/c/b/9/2/cb92164b6e8ef000/image_1gfsosr.png) 2. **Editing Item ID in the Supplementary Feed ** To match the supplementary and primary feed, you need to check the **item ID (Content ID)** of the item on **the primary feed**. ![](https://storage.crisp.chat/users/helpdesk/website/ab8a6f89b0a19000/image_hgsg2a.png) After that, please go to our app > **Feed Center** > **Supplementary Feed** tab > click into the feed > **Field Mapping** > edit the value at the **ID field** to make sure it is the same with ID on the primary feed ${color}[#d11a1a](__For example:__ ) * **Before editing** ![](https://storage.crisp.chat/users/helpdesk/website/-/c/b/9/2/cb92164b6e8ef000/image_sui2sc.png) * **After editing** ![](https://storage.crisp.chat/users/helpdesk/website/-/c/b/9/2/cb92164b6e8ef000/image_1s3fr1q.png) 3. **Edit the enhanced fields** And then, you can edit for the fields that you want, such as: * **Gender field** ![](https://storage.crisp.chat/users/helpdesk/website/-/c/b/9/2/cb92164b6e8ef000/image_l5jgkw.png) * **Age group field** ![](https://storage.crisp.chat/users/helpdesk/website/-/c/b/9/2/cb92164b6e8ef000/image_11sofvg.png) * **Addtional image link field** ![](https://storage.crisp.chat/users/helpdesk/website/-/c/b/9/2/cb92164b6e8ef000/image_1g0owj4.png) After you've edited the fields and save, please go to the **Feed Center** > **Supplementary Feed** tab > click into the 3 dots icon > Click on **Resync** to manual submit your feed right away ![](https://storage.crisp.chat/users/helpdesk/website/-/c/b/9/2/cb92164b6e8ef000/image_1i9u3lp.png) ${color}[#d11a1a](__For example the result of feed after add a supplementary feed:__ ) * **Before adding a supplementary feed** Additional images and Age-group: missing ![](https://storage.crisp.chat/users/helpdesk/website/ab8a6f89b0a19000/image_17qr8vl.png) Gender field: missing ![](https://storage.crisp.chat/users/helpdesk/website/ab8a6f89b0a19000/image_1jn7ml8.png) * **After adding a supplementary feed** ![](https://storage.crisp.chat/users/helpdesk/website/ab8a6f89b0a19000/image_1r20j04.png) ![](https://storage.crisp.chat/users/helpdesk/website/ab8a6f89b0a19000/image_joa313.png) --- A supplementary feed is a powerful tool that helps enhance Facebook catalogs by adding missing fields and updating existing information. By following the steps outlined above, users can successfully create and manage a supplementary feed to optimize their product data for Facebook ads and e-commerce campaigns. If you have any further question about the supplementary feed, don't hesitate to contact us via in-app live chat or email at [support@socialhead.io](mailto:support@socialhead.io)