Can u explain me <meta charset="UTF-8"> this?

Answer 1

UTF-8 is an encoding method of your document. It will store your socument in UTF-8, converts it back to the original document when used

Answer 2

it means that the browser will read your code in the language of UTF 8

Answer 3

UTF-8 is the HTML standard

Answer 4

Nope.
There are other encryption methods such as UTF-16,ANSI,ASCII,etc

Answer 5

It ISN'T needed in all versions of HTML we currently use

Answer 6

ok...is it always the same?

Answer 7

UTF-8 is not an encryption method, and isn't really a language either. Since computers only understand numbers, text encodings such as UTF-8 are mappings of characters we can use to numbers the computer can use. I recommend 2 specific articles to get you started understanding this.

https://blog.codinghorror.com/there-aint-no-such-thing-as-plain-text/

https://www.joelonsoftware.com/2003/10/08/the-absolute-minimum-every-software-developer-absolutely-positively-must-know-about-unicode-and-character-sets-no-excuses/