The nofollow attribute is the designation in the code of the HTML. It informs the search engine robot not to take the link in question into account when assessing the link page. Furthermore, it was originally mainly used for sponsored links, however, it is now increasingly being used on various types of portals where users add comments and posts. This is because many of them add their own links and thus create spam.
Example of nofollow attribute <a href=http://"www.seoski.pl"rel="nofollow">keyword


