On the 17th of this month, I modified the title, description and separator of the home page to save the blog. As we all know, modifying the title of the website title is not a big deal, but it is not a small thing for SEO optimization, because it will more or less cause this negative impact on the website, such as being demoted by Baidu search engine, and being punished by K station, etc. But what excites me is that Baidu will update the snapshot two days after the blog bar modifies the title and description. Here's a summary of the experience. Select when to modify the title and description
