What are internal links?Internal links are links between pages on the same site. For example, a link from the home page to a category page or links from a product page to similar product pages.
In short, internal links are links within the site and not pointing outside of the domain.
Why are internal links important?Internal links are important for three main reasons.
Here's a brief explanation of each.
CrawlInternal links provide navigation for users and search engines. A solid internal link structure ensures a site is maximizing crawl efficiency, which is the building block of SEO.
RelevanceProper internal linking provides relevance though linking related pages together and doing so with descriptive anchor text. A good internal linking structure creates 'neighborhoods' of content on the same subject or theme.
priorityInternal links provide a signal about what pages are most important on a site, generally measured by how many times you're linking to that page. Essentially, if you think a page is important, you link to it more often.
Internal links are links within your own website and are important in creating proper navigation and crawl paths, enforcing relevance and signaling priority.