Search engines have strict requirements for updating website content

　　1. Website construction Its own update frequency If a website is not updated for a long time, the number of visitors to both users and spider programs will decrease. It can be said that the more frequent updates, the more spider programs patronize, the greater the chance that your new information will appear on the home page of search results, and the more pages will be crawled.

2. Structure of the website If a website has an optimized structure and the spider successfully visits, it will be more willing to visit the website.

3. Functions of the server If the spider program indexes your website, and your server cannot load the page or access the database, the search engine will try to come back at the next update. If similar situations occur many times, the search engine will reduce the access to the site or delete it in the database.

4. The high and low PR values are just like the advantages of high PR values in obtaining high rankings. Many insiders believe that the similarity of PR values is the main factor for search engines to judge the update frequency.

5. Yuan "Review after the event" Someone set the following in Meta: to remind the spider program to visit every 5 days. In fact, because Google has reduced the role of Meta to a very low level, similar tags have little effect. However, if the time is set to a value after 30 days, it is considered valid.