Screenshot 1 clarity
Platform-documentedScreenshot 1 is the fastest chance to explain what the app does and why a user should care.
Why this matters
Apple says the first one to three screenshots may appear in search results when no app preview is available and should highlight the essence of the app. AppScreens scores screenshot 1 for first-impression clarity because users may judge the listing before they inspect the full gallery.
This is not an Apple rule that screenshot 1 must explain the app in 3 seconds. It is an AppScreens first-impression scoring rule.