What is the actual purpose of using the keyword in SEO?

Hi,
What is the actual purpose of using the keyword in SEO?

Really you don't know the purpose of using keywords in SEO?

IF YES, then why you added those links in the signature?

Your SEO keywords are the keywords and phrases in your web content that make it possible for people to find your site via search engines. A website that is well optimized for search engines "speaks the same language" as its potential visitor base with keywords for SEO that help connect searchers to your site.

This thread is totally rubbish