if i add link to my website what could i gain?

[Nazy]

[Jake]

If you are not yet listed in the search engines, your site may be 'discovered' through a link from another site already indexed.

Although search engines are using more signals to rank a web site, backlinks are still a key factor in determining search result ranking, search engines are still the biggest source of free traffic for most sites.

Adding too many backlinks too quickly can get a site penalized for violating search guidelines.

"Any link created for the purposes of search rank manipulation are a violation of guidelines"

Don't be obvious...

[raysor]

Unless you are charging for it, then nothing. You are just sending your visitors away.