Enable and start using Frequently Bought Together
The first thing to do in order to see Frequently Bought Together running in your online store and start converting is to enable it in the Theme Editor from the Shopify Admin following the next steps:
1. Inside Shopify Admin, go to Sales Channel → Online store → Themes.

2. At the top of the list you will see your published theme. Just click Edit theme and you will be able to customize it.

3. Then, click the App embeds icon to see your installed apps that support app embeds.

4. Here we can see that, for this example, we have Frequently Bought Together installed and that it is currently disabled. By clicking the button on the right, it will be automatically enabled.

5. Finally, save the preferences on the top right of the Theme Editor to confirm the changes.

Now, when you navigate to your app preferences you will be able the app is enabled.

Normally, once the app is enabled, the app will be located at the best spot of your product pages, but you can decide where to place it if you think another location would be more appropriate.