I don't understand. Help me, plis

Question

I don't understand comments.

Answer 1

Your question is unclear.
Comments in what?
HTML, JavaScript or what?

Answer 2

Comments are pieces of text than have mean ONLY to programmer than see the source code and are used for explain something about the code. Them are NOT processed by compiler/interpreters usually

Answer 3

Нужно ли учить программы, которые пишут
в Juva

Answer 4

I wish you could type in English!