? with (= average...), see upload ...

… what does ‘3 pts required’ indicate?

State your question a lot clearer if you want a useful answer. You need 3 karma to upload files here, but you don’t need any karma to post a link to a file uploaded somewhere else.

Thank you for the meaningful comment! … now, how increase karma?

Also read first and third part of the comment by @anon87010807.
(Did you consider to improve your style? I know questions by you for years now, and there rarely was one showing an appropriate effort concerning clarity and completeness. It’s not only the contributors of answers who should be expected to spend their time on putting things clearly.)

“Karma” is rewarded to users contributing something of value to this site.