Autocomplete on mobile browsers for username fields

1. What is the difference between Autofill and autocomplete?

What is the difference between Autofill and autocomplete?

Although they are closely related: Autofill is a browser feature that allows people to save information (on the browser or the OS) and use it on web forms. autocomplete is an HTML attribute that provides guidelines to the browser on how to (or not to) autofill in fields in a web form.