Glossary
Tracking ID (Tag)
A tracking ID, or tag, is the account-level identifier appended to your affiliate links (like tag=mysite-20 on Amazon). Networks credit and report earnings by tracking ID.
Why it matters for your earnings
It's the dimension your reports are sliced by, so structuring your tags — by site and content type — is the closest most affiliates can get to per-page revenue data inside the network itself.
Go deeper: Guide: Amazon Tracking IDs