What are the reasons for the site being demoted?

We are in the process of optimizing a website, often appear the site is down the right situation, this is why? During the period of the company's work, I summarized the following points.

1, due to the site http://www.aliyun.com/zixun/aggregation/9382.html "> Optimization over, resulting in the site down right

Website promotion should amount, although we hope that the site can get a good ranking in a very short time, but the site optimization is a long work, Baidu is focused on the user experience, if blindly focus on search engines, may lead to the site is punished.

2, in the site to update the article, there is no law

We optimize the site, to have a certain update law, set a good article daily update quantity, not a day to write a lot of articles, and then a few days do not write, the article updates the work is not stable, resulting in Baidu spiders crawl articles, can not form a good experience, resulting in the site is down right

3, update the content of the article is too poor, and the relevance of the site is not high

In writing articles, a lot of writing and site keywords unrelated to the news, or collect some unintelligible news, resulting in the content of the site and the Site keyword irrelevant, resulting in the site is down right.

4, a server has a lot of junk site

8630.html "> Sometimes, there are multiple sites on a server, and the quality of other sites is not good, resulting in the site is down right.

5, friend chain caused the site to be down right

Exchange with others friendship links are punished by Baidu, may cause their own site to be affected, so, often check links to the line.

Site is down the possibility of a lot of right, usually we optimize the site, we need to pay more attention to the optimization of the site, and choose the right optimization method to carry out.

This article by Ben Fu 707 http://www.baipuhui.com/original, reprint please specify.