Website title, description of the cause of the abnormal snapshot and resolution

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Recently many friends of the site have been the same problem, is the site in Baidu search results in the title and description of the display is not normal, incomplete, the site snapshot no description, the site snapshot can not be previewed, but the site snapshots updated every day, on this issue, why? What is the cause of it? The author talks about the cause of this problem and the solution

The trouble of robots.txt documents

In general, this happens when a particular URL is set to "nofollow, Noindex" in the Robots.txt, although this instruction tells the search engine not to track and include this link. But if a certain number of links to the link, the search engine may include the URL. The title at this point may be a URL and the description is empty. Of course, this happens most of the Google search engine. Baidu included "nofollow, noindex" links are relatively rare, but do not rule out this possibility.

The author in the first one months to optimize a station, has also appeared in this problem, because the robots.txt file was modified, resulting in the site title, describing the snapshot is not complete, has been looking for reasons to deal with a few days no effect, Also did not think will be robots.txt problem, later inadvertently found, so immediately revise over. So, the next day the site will return to normal, so, suggest this problem friend, must check good robots.txt file.

Ii. changes to the content and title of the website

This is a more serious situation, such as your site's title, description, or URL path has done all or most of the changes after adjustment. This will result in a large number of dead pages, will lose the trust of search engines, when the page from the search engine disappeared, because the previous page to do external links, search engines began to include this page, this time the description is very likely to be empty.

In the Web site revision or a wide range of changes, it is recommended that the best set of robots to prohibit the crawl error page and 404 error page production, so that on the one hand can reduce the loss of users, on the other hand can tell spiders this is a wrong address, prohibit spiders crawl does not exist in the web, During this period to maintain for the site to update original content and high-quality outside the chain.

Third, Baidu's ability to crawl data is not enough

According to observation, this situation is mainly Baidu's ability to crawl data is not strong enough. In particular, the use of CDN Web site, generally speaking, Baidu crawler cache domain name corresponding to the server IP time is more than 1 days, spiders crawl site, did not follow the DNS protocol to cache DNS records, but cache DNS records more than 1 days, so when the CDN changed IP, Baidu Spider in a day will also have been climbing inaccessible old server IP. This will result in a node's data can not be crawled phenomenon, so that the site title and description can not be normal display.

Baidu's analysis of data processing capacity has yet to be strengthened. And encountered this kind of situation stationmaster can not panic, generally will return to normal within one weeks.

Finally tell webmaster friends, if you check the site itself and the factors outside the station did not find a problem, then you do not panic, it is likely that Baidu itself or the database adjustment problem, the general situation will return to normal within one weeks. During this time you should continue to analyze the situation inside and outside the site.

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