Hi @depol,

This is a great question! For natively integrations, Klaviyo assigns one of the values in this reference table here:

• Source value reference

So a -6 means that profile was added via a “Manually Initiated (Subscribe)” either through you adding it from within Klaviyo or you imported it.

And a -9 means that profile was done through the API.  This is common if you use third party apps that uses the Klaviyo API to add profiles to your account.  As you can see from the reference, there are many integrations that are natively supported by Klaviyo so they have their own number (e.g. Shopify = -50) but since the API is available to anyone to use, including 3rd party developers, they come in as a -9.

Also remember, you can store any value for $source - so sometimes it can have a non-integer value if you’ve defined it elsewhere (commonly, in a SIgnup Forms).

Hope that helps!

@retention thank you very much for your reply, this is very helpful