Encoding in notepad++

Question

Notepad++

Hello,
please tell me what the Encoding tab in notepad ++ means and how to use it.
Thanks

Answer 1

"Encode in..." - displays the open file in the selected encoding.
"Convert to..." - converts the opened file to the selected encoding.

Answer 2

Clear. Thank you.
That is, it turns out that the file is a set of bytes that are saved according to the selected encoding.
And when notepad++ opens this file, does it need to determine the encoding so that it translates the file correctly?