Everybody knows, a when Nofollow label is inside cereal song algorithm very important label, its the most extensive use is in namely prevent to leave a message this the weight that rubbish links an influence to stand to oneself.

The focal point that debates today has two sides, the first: Nofollow label can concentrate PR resource; The 2nd: Nofollow label can stop in case next crawl of the spider.

Although present PR value is done not have so tall before, but the openly report of the weight that still can serve as a page, still be necessary to understand the concern between Nofollow label and PR so.

On the net a lot of people say Nofollow label can prevent PR to deliver those rubbish join, such saying include very much SEOer. This view, had not said inside that article of the government about Nofollow label again, had read an article carefully instead, can show an information fully, the PR that is a page passes a cost, it is to pass the PR value of this page to divide the link number with this page, and the PR value that reachs every link gets, Added Nofollow label not to represent what can center PR to deliver so, if because the page has too much insignificant link and of the PR that affects a page derive.

To this, a lot of people have doubt, previously all the time since Nofollow label does not use at this namely, ah, I want to say only, the thing that much person uses is not correct certainly, I say here also may not is correct, want to reach through oneself practice the result just is the most convincing.

The 2nd problem, namely about adding the link of Nofollow label, the spider still can crawl.

Inside explanation of Nofollow label government, respecting ” does not track this specific link ” a such word.

This word should understand very easily also, see this link has Nofollow ticket namely, not only not statistic is in the computational category of the page, and the spider still can be retreated automatically, undertake the crawl of another link.

Authority is clear, want the full page that the spider crawls he stands is special difficulty, be about to concentrate spider resource so, appoint it to crawl the page with those high value, raise collected machine rate, OK finally of corresponding website weight rise.

So a website, so proper that use Nofollow label, be very big effect.

In forum, had seen a few post says navigation stands, answer to should not add Nofollow label to make sure the weight of the page will raise a rank, I can say commonly, not should!

Since you collected his website to link the station in oneself, with respect to the website that should make sure he is high quality, otherwise, with respect to the sense that can lose navigation to stand.

Once had heard a word, “ navigation stands (network address stands) besides look to the user besides, still give a spider the ” that look, ah, very reasonable.

This also is why so much website wants to be mixed to Hao123 265 collect the reason that go in, besides the addition of discharge, still weight and spider climb what linage measures to increase.

If true be forced to do wants to add bad link, use Nofollow label appropriately, general the link that a page uses Nofollow label, Had better not exceed 5% .