This was a question someone asked on Google SEO office hours. They wanted to know if setting up a breadcrumb structured data navigation is enough for internal linking. John Mueller said that internal linking is an opportunity to communicate more than internal navigational links can.
Yes, absolutely. It’s something where internal linking is super critical for SEO. I think it’s one of the biggest things that you can do on a website to kind of guide Google and guide visitors to the pages that you think are important. And what you think is important is totally up to you. You can decide to make things important where you earn the most money or you can make things important where you’re the strongest competitor or maybe you’re the weakest competitor.
With internal linking, you can really kind of focus things on those directions and those parts of your site. And that’s not something that you can just replace with structured data. So just because there is structured data on a page somewhere, I wouldn’t see that as a replacement for normal internal linking. Even if in the structured data you also provide URLs, we don’t use those URLs in the same way as we would use normal internal links on a page. ”
It isn’t a ranking factor, but it’s a good way of telling Google what pages are important. The purpose of strategic internal linking, according to John Mueller, is to point Google and site visitors to the most relevant or popular topics. Internal linking is merely a way of pointing search engines to your important content and ensuring they can find and rank it.