I do not know much about wheels Link, but I know that is a circular restriction. By generating interrelated themes or network a chain of links can be created in a circular SEO technique. Thus, traffic can be obtained from large web site, especially for the home page. This technique of creating links in the chain is useful to increase SERP ranking. Large amount of traffic can be generated if this strategy is often effective. The chain links are connected to form a circle so that ending the last link on the home page of the website from where you started.
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