Source: http://www.madhavighare.com/web-writing/writing-a-series-of-blog-posts
In a series of blog posts, you organize your ideas better, thus presenting them better to your blog's audience
Because you are devoting a single blog post to each sub-topic or idea, you get more space to expand on that idea, and provide more information to your blog's readers.
Naturally, all of this helps in creating and establishing your authority over that particular topic, and sub-topic, which is always very good
Of course, all of this helps with your website's SEO because blog post series rank quite well with search engines because the series of articles helps create a good keyword association between your site and the keywords.
If you really have a good series of blog posts, then chances are that your blog's audience will be hanging on to your every word, and looking forward to the next instalment.
