Connecting App Store Connect unlocks downloads, proceeds, the store conversion funnel, your full review history (with reply-from-Artec), and an editable listing view in the App tab.
You'll need three things from Apple (App Store Connect → Users and Access → Integrations):
Issuer ID: the long UUID at the top of the Integrations page.
API key file: the .p8 file: Apple only lets you download it once, so keep it safe.
The Key ID: auto-filled from the .p8 filename when you upload it.
The key needs the App Manager, Finance, and Customer Support roles: Artec validates up front and tells you exactly which roles are missing if any.
Then pick which app binds to this project. One key works across all your projects.
Data timing: a recent slice appears quickly; Apple generates some reports asynchronously, so the store funnel can take up to a day or two to fully appear.