Your product probably has some specific data fields for your users to input product specific data.
Through Merge's custom fields, your users are able to link your product specific data fields to their respective integrations in one click of a button.
Start in your user dashboard, and click Configuration, then Custom Fields
In the Custom Fields page, you'll be able to see where to add your product specific fields.
Then, when your user is setting up their Linking Flow, they'll be prompted to link your custom field with their specific integration.
In the example below, your user uses Greenhouse, but this will work with any integration!