Guilin SEO Training: How to write the Nofollow tag? What are the impacts on SEO?

The "nofollow" tag was proposed by Google, Yahoo and Microsoft a few years ago. After the link is tagged with this tag, its weight will not be calculated. Search engines support the nofollow attribute, which can greatly suppress spam comments in blogs or forums. This is a great thing for webmasters.

nofollow is a value of the content attribute of the HTML meta tag (meta) and the rel attribute of the link tag (a), which tells the machine (crawlers) not to track the target page. In order to combat blogspam (blog spam), Google recommends using nofollow, telling search engine crawlers not to crawl the target page, and also telling search engines not to pass the Pagerank of the current page to the target page. However, if you submit the page directly through the sitemap, the crawler will still crawl it. The nofollow here is just an attitude of the current page towards the target page, and does not represent the attitude of other pages towards the target page.

Use of nofollow

There are two ways to use nofollow:

1. Used in meta tags: to tell crawlers that all links on this page do not need to be followed.

2. Used for tag a: login, telling the crawler that this page does not need to be tracked.

nofollow meaning

Nofollow is a link attribute. When added to a link, it means that spiders are not allowed to track this link, and the link is not allowed to pass the website weight. It is used to adjust the weight direction of web links and make centralized adjustments. It is often used by SEOers during the website optimization process. Nofollow is also an important means to combat spam links and has been widely used today. Currently, major search engines such as Google, Baidu, Yahoo, and 360 Search all support this tag.

How to write nofollow

For external links, such as advertisements or other outbound links, we can use the attribute "external nofollow". External nofollow is a more professional way of writing than nofollow, which clearly indicates that this link is an external link and does not pass weight. This attribute value is also used by search engines to avoid the generation of spam links.

There is also a method written in the meta tag at the head of the page, but this method is not conducive to our operation of more links, nor is it conducive to the processing of details, so it is rarely used. Of course, it also has its uses. We can use this method for some pages that need to be processed in batches with nofollow.

Write "nofollow" in the meta tag on the web page to tell the search engine spider not to crawl all external and internal links on the web page. Of course, there are several other writing commands in meta content. Let's take a look at them together.

The writing method is as follows:

1. This page can be crawled, and other links can be indexed along this page. Usually crawled by default, so it can be omitted directly

<meat name="robots" content="index,follow" />, abbreviated as <meat name="robots" content="all" />

2. Do not crawl this page, but you can crawl and index other links along this page

<meat name="robots" content="noindex,follow" />

3. You can crawl this page, but you are not allowed to crawl and index other links along this page

<meat name="robots" content="index,nofollow" />

4. Do not crawl this page, nor crawl and index other links along this page

<meat name="robots" content="noindex,nofollow" />, abbreviated as <meat name="robots" content="none" />

Where is nofollow used?

Nofollow means that the link does not pass weight, so we can use it in many places.

1. Use nofollow attribute in internal links

For example, for pages such as Contact Us, Company Profile, Advertising Services, About Us, etc., we can add nofollow to the links so that the weight of the homepage will not be passed to these pages, thereby guiding the weight to more valuable pages and making the weight more concentrated; because these pages obviously do not make much sense to search engines or users, they do not need to be given weight.

2. Used in the website’s export links

For example, for advertising links, users enter the website and click on the ads, which only brings traffic but not weight, so adding nofollow will not have any impact. For other external links that do not need to transfer weight, we can nofollow them.

3. Use in friend links

For some website links that have been demoted, banned, used cheating methods, been hacked, or lack management, we can add nofollow to block them by not passing on the weight, or delete them directly. Of course, when someone else's website adds nofollow to your link, if there is no problem with your own website, you can just delete the link. This is an act of distrust from the other party, so we don't need to worry about it and can directly delete the link.

4. Used in spam comments and advertising messages

At the bottom of many websites, there is a message comment function. Many people will use this function to leave links to promote their own sites. At this time, in order to prevent the loss of website weight, we need to add nofollow to block it.

Questions about nofollow usage

1. If the link is nofollowed, will the page be included?

Many newbies may think that adding nofollow to web links is one of the reasons why web pages are not included. In fact, this is wrong.