Practice link building involving the transfer of a web space for inserting outbound links or banners in exchange intermediary company corresponds to reciprocity, strategically placing inbound links on other pages of great influx of visitors.
Getting external links allows you to optimize the PageRank of a website and, with it, its search engine positioning. But it is necessary to take care of this type of campaign, controlling the type of site with which a page is going to be linked. If the associated website had a low PR or attributes punishable by search engines, the effort could be counterproductive and affect the evaluation that webcrawlers can make of the website.
Other denominations:
Link Exchanges