Link Building is one most important mechanism in the process of web-site promotion. Link Building Campaigns involve mutual exchange of links from different web-sites. Link Exchange is done in various ways by the organizations providing link building.

It is basically of three types:-
1) One Way linking: - In this type of link building activities directory submission is done to get a back link from the directory where web site is being submitted. And no return link is given. It can be paid if the directory is a paid directory.

2) Two Way linking: - In this process relevant web sites exchange links with each other based on the key phrases or the basic theme of the business. This service involves quite a lot of effort by the link builders.

3) Three Way Linking: - This process of link building is done in a very different way. It is done like you give me a link and I will give your sister web site a link in return.

Link building strategies are different for different types of link building activities.