by nitinchacko » Tue May 15, 2018 5:42 am
allows publishers to tell Google that they don’t want certain links from external sites to be considered as part of Google’s system of counting links to rank websites. Some sites want to do this because they’ve purchased links, a violation of Google’s policies, and may suffer a penalty if they can’t get the links removed. Other sites may want to remove links gained from participating in bad link networks or for other reasons.