Several pitfalls of exchanging links

      as everyone knows, the chain is very important for a website, so our rookie webmaster always tirelessly to find or exchange links, but some websites Links after adding no sense, our efforts will be wasted, because they used a variety of ways, to find Google not or can not identify these links.

            first, the most common, put the links in the framework of

              second: a little more sinister, just put your website on the frame, into a "

          third kinds: non direct links, and the second somewhat similar, commonly found in some ASP self-help links.

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