Blogs are different from the static websites due to two reasons namely their genuine social nature and the ability to inform search engines every time they get updated.
As you know, a big chunk of SEO is all about building back links. Different from static websites, this task is a lot easier with blogs by leveraging the social media capabilities of syndicating valuable content; also, it’s worth mentioning the perceived authority social media environment is assigned with by the search engines, especially Google.