How PageRank Link Exchange different from a link farm?
Link farms are sites that are set up to contain massive numbers of links to other sites, in hopes of raising the search rankings of the sites they link to. This doesn’t work – in fact link farms can now have the result of lowering the search rankings of the sites they link to, because search engines penalize sites that try to use those kinds of tricks. PageRank Link Exchange is different, it is search engine friendly and the links that are generated appear on relevant and respected website.
