1. Spiders often cannot access the site
Search engines want their users to have a good user experience, which is the most important factor in the ranking of search engines. Therefore, if a website often does not open the situation, the user can not get a good experience, and spiders can not often crawl to the web. Search engines will think that this is a low-quality site, not to rank.
2. Similar or identical content to other Web pages
Search engines want to show a lot of unique original content or articles, if the site content is poor or a large number of copies of the content of other sites, this will likely be a negative ranking signal.
3. Link to low-quality or spam sites
One way to do this is to link to a low-quality or spam site, which generally doesn't have a big impact on site rankings, but if a site has a lot of these links, it will definitely affect the rankings.
4. Participate in link plans or actively sell links
The search engine does not like the webmaster to pass the link weight for the purpose of selling links, also do not like the webmaster to participate in suspicious connection plan, such as provide page access counter, and then hide the link inside.
5. Many pages have duplicate titles or meta tags
Title tags are an important signal for site rankings, and if not written for a page a unique title tag may be a negative ranking signal. As a result, the descriptions are all the same as the keywords and may also be considered as potential negative ranking factors.
SEO Negative ranking factors