Search engine optimization is a process of affecting the visibility of a website or a web page in a search engine's such as natural organic or earned results.

Hit the enormous search button and all will be revealed.

As first posts go this is pretty bad.

Thanks Carl Hardy

what is the technique that affects the visibility of website ?

Search engine optimization is a technique to increase the visibility of the website in search engine and to increase keywords ranking as well.

Search engine optimization is a good method. Search Engine Optimization is increase the visibility of the website and to increase keywords ranking as well.