Linkbuilding uses writing Pr articles to increase the traffic and success of the site. Pr articles can be placed in different places of the internet for free, even for money. Some Internet services serve as a place to present the offer and demand, and can publish Pr articles with links to the site, always a specified topic.
Indirect linkbuilding also uses publishing of Pr articles on third-party websites. They must go about Pr articles valuable, only then can they be placed on successful other sites. It must be closely related to the text and must be written in a quality and readable way.
Indirect linkbuilding also means participation in various discussion forums and the visibility of pages on social networks. It's about embedding posts with a link to an optimized website.