What are internal links and why are they important for SEO?

What are internal links and why are they important for SEO?

Very good question, 

Internal link is internal linking, which is the link of another page on one page is called internal link ink, that means if your blog is about fitness, and on that page you have put the link to another post, then us The link is called internal link, internal link,

The advantage of this is that when a person comes to your page, then he / she also goes to the post you have given in that post by your internal linking. With this your posts also rank. On which he did not come by searching on Google, but later on it, then interlinking is very important.