How does a search engine rank websites?

I don't have much time to take care of my website. I always like to fill in website information with some information every day. In this way, my website has been ranked well. Recently, my website experienced a drastic ranking change, I suddenly ran to the second page, and I didn't care too much about it. I maintained it every day, but sometimes the two websites could not be opened three days ago. In the past few days, my website snapshot was abnormal, recently, we just had time to analyze the specific causes of website rankings.

A Bad Request (Invalid Hostname) error was found on the website through website snapshots.

(As shown in the figure)

 

After preliminary judgment, a problem occurred to the space provider. Then, I checked the website log and traffic analysis and found that the website could not run in several regular periods. Immediately cut the picture and packed the problem and sent it to the website space service provider. Three days later, the space service provider sent back an email. I was a little surprised to see a lot of data in front of me. Every day of the Nanjing seo website, there are CC attacks that have lasted more than five hours. This attack causes the website to be unable to be opened for a long time and eventually leads to a decline in the website ranking.

From the process of falling rankings, it is not hard to see that it is also possible to reduce the ranking of a website in the short term using this mean method. Currently, the industry is fiercely competitive and SEO experts are like the cloud, various SEO methods should not be used