There is no definitive answer to this question, as the effect that blog directories have on SEO can vary drastically depending on the blog directory in question. However, some experts believe that blog directories can be beneficial for SEO if used correctly.
If a blog uses a well-known and reputable blog directory, such as Google’s Blog Search or Technorati, then using the directory can help increase traffic to the blog. By displaying the blog’s content prominently in the directory, potential readers may be more likely to visit the blog and find new content.
However, using a blog directory improperly can have disastrous consequences for a website’s SEO. If a website is not properly optimized for search engines, including links from popular blog directories, then using a directory may actually hurt the website’s rankings.
For this reason, it is important to carefully consider whether using a blog directory is right for a particular website before making any decisions.