How do Gmail models adapt post-campaign performance?

Gmail's post-campaign learning:

After you send, Gmail observes how recipients interact: opens, clicks, deletes, spam reports, replies.

These signals feed back into models that predict future placement. Good engagement improves future predictions. Poor engagement worsens them.

The adaptation is relatively fast. A campaign that performs well can positively influence the next send within days.

Conversely, a campaign that generates complaints or ignores can negatively affect subsequent sends quickly.

Each voyage teaches the harbor about your cargo quality. That learning shapes your next arrival.