[bpfb_link url=’https://yoast.com/what-is-cornerstone-content/‘ title=’What is cornerstone content? • Yoast‘ image=’https://yoast-mercury.s3.amazonaws.com/uploads/2017/04/what-is-cornerstone-fb.png‘]Cornerstone content is the foundation your site is built on. Find out how to improve your site structure with cornerstone content.[/bpfb_link]