I assume you all know what a backlink is (if not, check out article on backlinks). Many beginners think that to get lots of traffic and a good search engine ranking, you just need to post your link all over the net. This is not the case. Certain backlinks have more 'weight' - influence your ranking better - than others. So what factors determine how much weight a link carries?
article on dofollow/nofollow links for information on why websites use the nofollow attribute.
Ok then, but how do I tell if a link is nofollow or dofollow? Well, you could sift through tons of HTML markup, but that's not much fun and takes a looonnnggg time. Or you could use a tool like NoDofollow (and add-on for Firefox). What it does is highlights links on a page a different colour depending on whether they are nofollow or dofollow. This way you can see if your favourite article site or blog uses nofollow on their article backlinks or post comments. If the site uses nofollow, I would recommend you put it to the bottom of the of the list of sites you want a backlink on. Don't disregard nofollow links completely - they will still bring valuable traffic if placed in a suitable place on a page, it's just that a dofollow link will do this and help your search engine ranking.
In my next post, I talk about the importance of PageRank (PR) and how to increase your PR, that's where I'll get on to the actual techniques of SEO.
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