Moz is very well known for all things SEO. Their Beginner’s Guide to SEO which is invaluable if you're new to SEO. Many experienced SEO professionals post to the Moz blog and the quality of the content is monitored regularly, so you can count on any information you find there being useful and high quality.
2. Search Engine Journal
For a broader read than just SEO, Search Engine Journal goes a little wider, with content on social media and pay-per-click (PPC) advertising as well. SEO is still the main focus and they have good a mix of posts that are great for beginners and more advanced users alike. They also cover important updates, tips and tricks for more experienced SEOs users amongst us.
3. Search Engine Land
Search Engine Land provides content on any topic related to search engines, with a primary emphasis on SEO. They cover updates to search engines and any search engine related product, provide tips on doing different aspects of SEO well, and generally provide educational information useful to anyone that practices search engine marketing.
4. Search Engine Watch
Search Engine Watch covers general trends in marketing and advertising, but as the name suggests, the site is concerned first and foremost with providing information related to search engine marketing. With a lot of content focused on helping marketers with recent and future trends (like mobile and voice search), it’s a good blog for helping you stay up to date on the fast-moving world of SEO.
5. SEO Book
While most of the blogs listed above have a broader focus that goes beyond just SEO, SEO Book is more directly focused on SEO issues specifically. They sometimes go a bit deeper into the technical side of things as a result, so this site is best for website owners that have already learned the basics of SEO.
6. Search Engine Roundtable
Search Engine Roundtable is another respected resource on news related to the search engines. A lot of their content focuses on announcements and updates made by the companies that dominate the search engine space (especially Google). It’s a good spot to check in for the search engine news likely to influence your SEO strategy.
SEMRush sells a product that helps businesses do keyword and ranking research to help with SEO, so it makes sense that their blog would focus on the practice of performing SEO well. Their posts tackle tips for doing SEO effectively, ways to avoid penalties, and case studies to help readers learn from companies that have pulled off traffic and ranking improvements.
8. SEO Nick
SEO Nick covers a lot of the beginner topics that website owners should know about doing SEO. From understanding the basics of conversion optimization to performing keyword research, if you find the more technical and expert level blogs a bit intimidating, it’s a good resource to fill in your 101 level information.
The Backlinko blog provides in depth guides and example-driven research to help readers strengthen their SEO strategy. All the site’s posts are SEO focused and dive deep into the topic covered. The blog is especially well regarded for providing actionable tips for link building, one of the hardest parts of SEO.
The SearchMetrics blog looks at trends and useful updates in online marketing in general and SEO in particular. Their posts often dive into more specific SEO topics, like SEO for certain industries or geographic regions.
The Ahrefs blog primarily covers SEO topics, but occasionally branches into other fields of online marketing. They often include case studies, guides, and in-depth research to help businesses gain a thorough understanding of different aspects of SEO and marketing.
The Brightedge SEO blog is yet another site website owners can turn to for general education and tips on various SEO issues. They cover search engine updates, and look at topics like guest posting and performing SEO in other countries. They’re another good site to keep your eye on for up-to-date information and a wide variety of SEO tips.
13. SEO by the Sea
SEO By the Sea is a blog focused on analyzing how the search engines work. By focusing on things like patents search engine companies file and other information they release directly, the blog is able to dive deep into the workings of the often mysterious search engine algorithms to help SEO experts better understand how search ranking works and what they can do to improve theirs.
The QuickSprout blog is focused on ways websites can grow their traffic. The posts there consistently include in depth research and examples to help readers better take actionable insights away from their reading. While the blog goes broader into online marketing than just SEO, many of the blog posts focus on tips and techniques important to improving SEO.
15. Raven Tools
The Raven Tools blog covers a lot of SEO tips and technical topics that are important to doing SEO well. The brand behind the blog provides tools that help customers create marketing reports, so a common theme in their topics is figuring out how to incorporate data and analysis into your strategy.
SEO isn’t something you can learn once and feel like you have it down. It’s a practice that continually evolves as search engines make updates and try out new things. If you care about how well your website performs, then keeping an eye on SEO tips, tricks, and updates like those covered in the blogs listed here is well worth your time.