There are additional more difficult techniques of the link building but first 2 are the most important sort that the one way link and the reciprocal link that anybody with a web site can obtain without stepping too intimately to the out evade of sandbox. The system of Reciprocal link building is essentially a link trade between the two web sites. Web site one puts a link to web site two & vice versa, and can be formed of the text link or the image advertise between every web site. On the other hand in the recent months these sorts of links are measured less important than the one way link building system by the search engines. You may be inquiring yourself, “Why difficulty then?”, and obviously that is a big query that ought to have a great answer. In the earlier period a external link was only add up as one link by the search engines despite of what, so what started to occur over the time was that completely unrelated web sites which is exchanged the links to influence the results of the search engine.
As for as example, a web site about foreign cars was trading the links with another web site which deals about the painting of the house just to add a link. The Search engines have developed to the position that they now understand that anyone exploring for the foreign cars perhaps does not care about the painting of the house, so this sort of exchanging the link is greatly not counted.