Search engines bots (Google, Yahoo, Bing, Qwant, Yandex and many others…) use a Page ranker system in order to classify pages in the search result, so each page on the website has a specific rank based on how many links it includes.
This module gives the possibility to hide a specific link or links in a page (keeping the same behavior of a normal clickable link) in order to control more the ranking of a page.