Blog commenting is by far one of the easiest ways to get related links to your site.

Now, not only do you need more links for your site, you need related links. These are links coming from a site that is related to what your site is about. For example, if your website is about car sales, you would need to have links from other sites related to cars, rather than links related to flowers. Blog commenting is a way to gain these links.

With blog commenting you not only get a higher search engine ranking, you gain the benefit of a higher page rank and faster search engine indexing. Most blogs have a high page rank; therefore search engine spiders visit these sites on a regular basis meaning your links will be crawled almost instantaneously. One-way incoming links is one of the top factors in higher search engine ranking. With blog commenting, you can get unlimited 'keyword' links to your website, having more keywords to your website will result in a higher search engine ranking. Having high PR social bookmarking sites linked to your website will improve your websites PR. With a higher page rank, you can link to your new/existing sites and improve their ranking at the same time.