Anchor Tag NoFollow
Our indexing robots use the rel="nofollow" option used in anchor tags to stop bots from following links that contain the nofollow directive.
If nofollow is detected in an anchor tag that link will not be followed.
The rel="nofollow" in anchor tags gives you much better control over which links in a page a search engine should not follow.
<a href="" rel="nofollow">Sign In</a>