What is the autocomplete on or off form for?

Question

What is the autocomplete on or off form for?

<form autocomplete="off">
<label for="e-mail">Ваш электронный адрес: </label>
<input name="Email" type="text" required />
<input type="submit" value="Submit" />
</form>

Answer 1

Everything, I found the answer:

Definition and Usage
The autocomplete attribute specifies whether a form should have autocomplete on or off.

When autocomplete is on, the browser automatically complete values based on values that the user has entered before.

Tip: It is possible to have autocomplete "on" for the form, and "off" for specific input fields, or vice versa.

on

Default. The browser will automatically complete values based on values that the user has entered before

off

The user must enter a value into each field for every use. The browser does not automatically complete entries