I do not understand the concept link no-follow !!
Welcome to the forums, @thanhtranmobigo.
Nofollow links are explained in this Google help article:
1 Like
In HTML, this is the syntax:
<a href="a-link.html" rel="nofollow">link text</a>
What it does is tell the web crawlers not to follow the link where rel=“nofollow” is placed. That is, not to add the link to the public search page.
You’ll want to use it on sign-in pages, for untrusted content, or any other reason you think the page should not be made public in search.
1 Like