Cornerstone content is a crucial aspect of your SEO strategy, as it’ll help you rank for your most competitive keywords. In a nutshell, it means you create a handful of comprehensive, superbly written articles and optimize them for your most important keywords. Then, you link to these awesome articles in other pages and blogs, which focus on long tail keywords. Your internal linking structure shows the search engines that your cornerstones are the most complete, most important articles on your site, which increases their chances to rank significantly.
In this blog post, I’ll tell you a bit more about cornerstone content. What type of content should these pages have? What should you be writing on these pages? And how do you select your cornerstone articles if your site has been around for a while?
Cornerstone articles are the most important articles on your website. Their goal is to provide the best and most complete information on a particular topic. They should reflect your business or communicate your mission perfectly. Furthermore, cornerstone articles should be timeless, by which we mean they should retain their relevance. It’s also crucial to keep your cornerstone content free from mistakes and up to date.
Above all, you want your cornerstone articles to rank high in the search engines. Writing great cornerstone content and having a good internal linking strategy will help you achieve that.
Source : Yoast