Social Media Cision compiles list of top 100 blogs in PR, social media, marketing, and SEO How many are you reading? And why not? By Becky JohnsApril 15, 2011 SHARE 1. Social Media Examiner 2. ignite Social Media 3. Mashable 4. Search Engine Land 5. SEOmoz Blog One question: When is a blog considered a website, and vice versa? For instance, Mashable calls itself a news site, not a blog. To read the full story, log in. Become a Ragan Insider member to read this article and all other archived content. Sign up today Already a member? Log in here. Learn more about Ragan Insider.