I. Culture Basic Concepts. What is the difference between actual application? content
It is recommended to read related articles in advance:
“What is Robots.txt? How to view robotx.txt? Roots.txt limit How to release? “
“How to use the NOFOLLOW label? “
Many of the small partners who have just learned SEO optimization, Robots.txt and Nofollow are always unclear in practical applications. First, we will first get the concept between the two, and then analyze the difference between the two according to the actual situation.
I. Culture basic concept
1. What is robots.txt?
Robots.txt is a document that is stored at the root directory of the website. When the search engine spider crashes the site, you will first check if there is robots.txt on the website. If there is, the search engine generally follows the rules in the barobots.txt on the website; if there is no existence, the search engine spider can access all the content on the site. Not all search engine spiders will follow Robots.txt, but overall, most of the search engine spiders will grab the website according to the Robots.txt rules.
2. What is NOFOLLOW?
We can imagine the entire Internet into a large city’s subway system, each is like a separate site. Search engine spider wants to crawl all the sites of the entire city, and the most reasonable way between the site and the site is to link each other, and finally form a huge complicated spider web. Search engine spider will have been a link. Climb down and constantly discover new content. In this process, there will be many times the site is linked. Some sites are limited, that is, it is a site that is linked, the higher the ranking? Just consider the number of links to determine the level of the site ranking? There have been people who have drilled the air, through a large number of garbage chains, such as publishing a lot of unrelated content on other websites to increase the website rankings, which seems unreasonable. So the search engine improves the algorithm, and even launched “Nofollow” to specify the entire link market.
NOFOLLOW is the property value of the A tag in the HTML page, and the common usage is as follows:
Once the A tag plus rel = “nofollow”, it is to tell the search engine not to track this “URL link”. This link is not trustworthy, do not pay the weight of the page to this “URL link”.
II. What is the difference between actual application?
1. Can NOFOLLOW can ban search engines?
the answer is negative. Many people think that the link is added to Nofollow will not be captured by the search engine, such as:
Assuming the search engine will grab this article at this time, there is a “Baidu” link in May’s article. The original search engine may continue to crawl the “Baidu” page, but it sees “Baidu” plus A “NOFOLLOW”, which suggests that the search engine can no longer continue to grab the “Baidu” page, nor can it give the “Baidu” page to transfer weights. This path is not available, but does not mean that the search engine will no longer grab the “Baidu” page again. Search engines can also capture the “Baidu” page through other channels.
Similarly, such as a site uses robots.txt to ban the crawling of the search engine, but there is a link on other websites to point to this site that is banned from searching engine, the search engine may still find this site and Enter the index and appear in the search results.
2. NOFOLLOW is the same as the Robots.txt mask method?
the answer is negative. Nofollow is a single access path, which is a link, blocks the search engine to continue crawling forward; Robots.txt can prohibit search engines from grabbing a single link, all pages under a column, even the entire website.
In addition, the NOFOLLOW tag can block the link outside the station; but Robots.txt can only block the links in the station, and there is still a big difference between the two.
3. Plus NOFOLLOW, is this link really not worth?
The answer remains negative. The above May has been saying that the link has been added to Nofollow, which means that the search engine will not track this link, nor will it transmit weight, is it meaningful? For example, our webmaster will often leave a message on someone else’s website or go to the forum. Our link will often be added to Nofollow. Do you not exchange interact? At least the opportunity to expose your website, add the user to the entrance to your website, your website does not care before every place, he may visit your website, this is not directly increasing you Does the website traffic? Effective natural traffic will drive your website rankings.
Robots.txt and NOFOLLOW sillyly unclear SEO optimized small partners, pass the above explanation, are you clearer? If you have any questions, please leave a message below.