Each site "during its lifetime" collects external incoming links in different ways, and gives out outgoing links. Building up the external link mass is a big plus for a website, and the presence of outgoing footnotes on it is a minus.
All links are taken into account when ranking sites in the table of ranks. The more high-quality, natural and high-weight incoming hyperlinks to the site and the fewer outgoing ones, the more "stars on the shoulder straps" the resource has, and the higher its position in the search results.
Thus, to ensure that the web site does not lose anything, it is necessary, if possible, not to place outgoing footnotes to third-party resources on its pages, and those without which it is impossible to do, forcibly close from indexing.
For this purpose, there are special tags - nofollow and noindex.
Below is a brief and clear explanation of all the concepts and designations, as well as how to apply these tags in practice.
An incoming link is a footnote to a site from another source.
An outgoing link is a hyperlink from a resource to a third-party Internet project.
The Nofollow tag is an html-code that is used for the prohibition of indexing links for the search engines Yandex and Google.
The Noindex tag is used to close text information from indexing.
This tag can hide duplicate or other text from the "eyes" of search robots, and it will remain visible to website visitors.
You can detect internal and outgoing links on the resource online using the service tool - http://pr-cy.ru/link_extractor/
Unfortunately, the analysis is carried out only for one specific web page, and not the entire site, that is, you will have to analyze all the sections in turn. With this tool, you will get information about the number of outgoing and internal links on the page being checked, as well as the URLs of footnotes, their anchors (text names).
Another similar service for online audit is - http://mainspy.ru/analiz_ssylok_sajta
The disadvantage of this analyzer is that it does not specify the anchor of hyperlinks and the presence of special tags used.
The examples below show how the "nofollow" and "noindex" tags hide outgoing footnotes and text information from indexing. In the html code of a link or text, you must add a special attribute yourself and give the command to save the changes you made.
To close the link
<a rel="nofollow" href="http://site.ru/">Link name</a>
<a href="http://site.ru/" rel="nofollow">Link Anchor</a>
To hide the text
<noindex>Text to hide from search robots</noindex>
<!--noindex-->Article announcement that hides from indexing<!--/noindex-->
To close the link and the text at the same time
<noindex>The text that we hide<a rel="nofollow" href="http://site.ru/">The name of the web link</a></noindex>
<!--noindex-->The paragraph hidden from indexing<a href=http://site.ru/ rel="nofollow">The name of the footnotes to the source</a><!--/noindex-->
To prohibit indexing of the traffic counter code
<noindex>code of the counter or informer</noindex>
<!--noindex-->the entire informer or counter code<!--/noindex-->
For example, the LiveInternet counter
document.write (<a href=’http://li….ru/click’ «+
«target=_blank><img src=’//Avacym.Ru +Math.random
«‘ alt=» title=’Livet’ …width=’88′ height=’31′></a>»)
For example, informer Mail.Ru
<!-- Rating@Mail.ru logo -->
<a rel="nofollow" href="http://top.....il.ru/jump?from=49">
<img src="//top-fwz3.mail.ru/counter?id=Avacym.Ru =165"
style="borr:0;" height="31" width="88" alt="Mail.ru"/></a>
<!-- //Rating@Mail.ru logo -->
It is worth noting that search engine robots sometimes mistakenly take into account hyperlinks closed with the "noindex" tag, so using the "nofollow" tag is preferable.