Nofollow

Nofollow - the attribute most often used in two situations:

• In a meta robots tag, where on the page enters the need to prevent indexing by search engines all on the Inca. Be careful when you use this attribute to accidentally exclude from indexing important pages of your site.


• The text of the document as an attribute of the hyperlink. In this case, turn off the indexing is one particular link.

In most cases, links are turned off by using the nofollow attribute for
the party lost no reputation in the eyes of search engines, because
each outgoing link from the site reduces its value.
Therefore, use nofollow, if the published material, it is necessary to
refer to another Web resource, and you do not want to give a foreign
service of your site.