What is rel = "nofollow" and what is it?

What is rel = "nofollow" and what is it?
With all the time that we still we had not dedicated a post entirely to one of the basic tags in the small world of SEO: The rel = "nofollow" , and that could not be, so today it was time, you we teach the basics about this label which is very useful for Evil ™ and also to do a quality job positioning, and you decide what you stay with the two options.
Table Of Content

  • What is the rel = "nofollow"?
  • How do you properly use the rel = "nofollow"?
  • Do you value the post?

What is rel = "nofollow"?

The tag rel = "nofollow" is a label that is placed on the links like this:
<a href="http://techindroid.com" rel="nofollow"> TechinDroid </a>
The above is just the basic HTML link within is, in this order:
  • the operator a href is only the operator to put the anchor text or link text, you need the opening and closing end, which is just </a>
  • Then you have the URL of the link, in this case to the home.
  • Then you have the tag rel = "nofollow" , which is where we will refer later.
  • And finally, the anchor text. In this case: TechinDroid.

What is rel = "nofollow"?

Strictly speaking rel = "nofollow" what it does is tell Google something translated into the language of humans:
Do not follow this link, has nothing of relevance behind, what is relevant is here
Whereupon Googlebot does not follow the link and, therefore, it does not give it the importance that would have that link dishing the real PageRank of the page that links.
Not because it means that other more relevant links, much less, for example lead, and reducing it to the absurd:
  • If a page with PR from = 4 (of course real and unrealistic) four outgoing links, it will PR 1 to each of the links.
  • If from a page with PR = 4 there are four outgoing links, three normal and one with rel = "nofollow" tag will 1 to each of the three normal links and nothing to link with the rel = "nofollow", ie, the other point of Page Rank simply be lost in the hyperspace.

How correctly use the rel = "nofollow"?

Do not believe that this label only serves to make putaditas in trade links and post (which also must be very beware of it), but can also be used in a consistent and professional.
There are several occasions when it is necessary to use the rel = "nofollow"
  • To avoid duplicate content in the content itself, for example, archive pages, tags and categories from your own site.
  • To place it in the comments , as they often do not lead to sites that are consistent with the theme of post and your blog.
  • To place when appointments images or fonts because if you tell you the same thing, Googlebot is little better pass through there, right?
In addition to this it is important to maintain consistency on the map link to your domain, ie: For Google is not natural that a domain has all its "normal" links, you must have a ratio of links with rel = "nofollow" , so if you see that you're going to linkbuilding, you must also go for such links.
So much for the introduction of the rel = "nofollow" tag, although you could write a book of several volumes on it, with this we now have more than enough. Of course, if you still have doubts comments are all yours.