Internal link is a typical hyperlink pointing from one page to other page within the same domain. These kind of links are very important for a website since it allows to increase more traffic and users to navigate the website properly.
Internal links are links that are used within the same domain. The links get directed from one page on that domain to a different page on the same domain. This helps in navigating the website. They also connect your content and give search engines an idea of the structure of your website.