What is apple-touch-startup-image and what does it come with?

Question

iOS

https://developer.apple.com/library/ios/documentat...
It seems that I read it, I did everything as it should, but it does not work.
Does anyone have any ideas?
upd Used for the site, maybe it's only for applications?

Answer 1

IOS has the ability to pin the url to the desktop. So
apple-touch-startup-image closes the screen while safari loads the url