What makes a good blog post?

A blog helps the creator communicate with people that share the same interest and him/her. It is a place to share ideas and open up about topics that are important to the writer. I researched a blog about movies( http://themovieblog.com/) and its about movie reviews and updates on actors. Also I researched another blog about Jordan sneakers (http://solecollector.com/) and it was about Jordan sneaker news, release dates, and anything that is happening to the brand.