https://www.searchenginejournal.com/ Launched in 2003, SEJ is unique in its community-based approach to search marketing content. They educate and empower the SEO community by providing the freshest news and latest best practices.
https://searchengineland.com/ Search Engine Land is a leading daily publication that covers all aspects of the search marketing industry. It also features contributed articles filled with practical tips, tactics and strategies for running successful marketing campaigns.
https://www.socialmediaexaminer.com/ Boasting over 450,000 email subscribers, Social Media Examiner helps millions of businesses discover how to best use social media to connect with customers, drive traffic, generate awareness and increase sales.
https://www.seroundtable.com/ Search Engine Roundtable provides a comprehensive view on search engines and search engine marketing from five segments of the Web population represented by senior members of the major SEO/SEM forums on the Internet.
https://www.smartinsights.com/ Started by two cofounders, Dr Dave Chaffey and Stu Miller, SmartInsights helps members plan, manage and optimize their marketing using the downloadable planning templates, guides and interactive learning tools.
http://www.marketingprofs.com/ Trusted by 600,000 professionals globally, MarketingProfs is a source that individual marketers, marketing teams, and some of the world's largest organizations turn to for modern marketing tools, training and discussions.
https://www.copyblogger.com/ Copyblogger, founded by Brian Clark, is also known as "The bible of content marketing". Brian teaches people how to create content that attracts attention, drives traffic and builds your business.
https://www.wordstream.com/blog A premier Google Partner, WordStream develops online marketing software, provides managed PPC advertising services, and shares online marketing advice through their blog.
https://ahrefs.com/blog/ The Ahrefs blog provides a comprehensive archive of articles including tutorials and case studies with powerful marketing strategies that beginner and advanced SEO's alike can benefit from.
https://gaps.com/ Gaps is a bootstrapped, three-man operation with the sole focus of helping create more online success stories by sharing unique business opportunities based on profitable case studies.
http://sethgodin.typepad.com/seths_blog/ Seth Godin riffs on marketing, respect, and the ways ideas spread. He's a best selling author of over a dozen books, and one of the web's first prolific bloggers.
https://www.authorityhacker.com/ Founded by Gael Breton and Mark Webster, Authority Hacker suggests actionable advice based on actual, real-time, up-to-date experience to grow online businesses in a concrete way.