One of the most common items in a list of things to do when SEOing your site is to create good backlinks from related sites, and in particular, blogs. Thousands of SEO guides recommend leaving relevant comments on a related blog post to your site with a link and good anchor text.
But before you rush out onto the world wide web writing hundreds of comments on blogs that talk about the widgets you sell, don’t forget that the vast majority of blogs, like this one, are built with WordPress. Whilst this is no bad thing - I recommend WordPress to the hills and back - it’s worth noting that they have automatically included ‘nofollow’ on comment links and that you have to download a special plugin to remove it.
This means when you make a comment on a blog about ...