Include examples of what metrics devs will see after promoting an app

[jessveegee]

Link to documentation with issue

I couldn't find the exact page for this, but may be the case this needs to be created for here: https://platform.zapier.com/docs/zapier-intro

Describe the content issue

"Document usage report to set expectations before the dev has an app with the visibility that includes usage reports.

This may even help win developers who value this a lot and don't get the same usage reports at competitors.

Idea came from answering: https://secure.helpscout.net/conversation/415625846/628052/?folderId=20363 "