What do you mean by hook in link building?
 

What do you mean by hook in link building?

With link building there are essentially 5 types of “hooks” or pages built to encourage links. They are: News, Contrary, Attack, Resource and Humor. A News hook is one where you report on industry news. But it's not just a rehashing of someone else's post.
What is referred to as a hook in link building. the element of a content that makes a potential linker interested in your content. the code used to embed a link on someone's website

The compelling element within your content that attracts other websites to link to it.