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Here is Yahoo's official release, which is considered a factor in cheating websites. For other search engines also have a very good reference.
If your site has the following behavior, it is very likely that Yahoo listed as a cheat site, but not included:
1. There are hidden text or hidden links in the Web page;
2. There are a lot of keywords that are not related to the content of the Web page.
3. Use unnecessary jump or redirect technology in Web pages;
4. There are a lot of links to other websites in the page;
5. Pages with a large number of duplicate content throughout the website;
6. There is a large number of unnecessary subdomains under a domain name;
7. Sites with a large number of malicious ads, malicious code or harmful plug-ins on the page;
8. There are active links in the page to have been Yahoo abandoned the site;
9. In a large number from the message, Forum and other mass links;
According to Yahoo official 9 of the problem of cheating, I give you a detailed explanation.
1th: Hidden text and hidden links are the most taboo search engines, easy to appear in the case is the forum and the horse-hanging site. Many people use this convenience to leave hidden links and text, so it is fatal to the webmaster. Because your site is very likely for this reason by the search engine to seal the station. It is recommended that you always check your site and forum.
2nd: There are a lot of words in the Web page that don't want to do with the content and the theme, this I believe that a lot of webmaster sites have appeared, so it is recommended that friendship links as much as possible, because your anchor text relevance is very poor will also fall right, of course, intentionally other keywords and stay anchor link is more easily listed as cheating site. So you must be content relevance to do the page.
3rd: Jump and redirect, this use of friends are also more, so do not use 301 or other jump or redirect technology.
4th: There are a lot of links to other websites in the page, this I explained in detail, out of the navigation site, other sites do not recommend, of course, if the chain is not counted, but if you are relying on blog to raise the station, do not recommend that you have a large number of links in a post to point to different sites, Suggest an article 1-2 links can, so the blog will not be K, quality is also good.
5th: This is more serious, many sites are unavoidable, especially the business class and community class dynamic site, because some merchandise ordering pages, search pages, are no value duplicate pages. Of course you are more dangerous if you have a lot of pages inside the site that are repeated in real pages. This is called the door page, the site is very large, the forum is also prone to many duplicate posts, so need to focus on maintaining this piece.
6th: A domain name exists a large number of unnecessary subdomains, that is, do not abuse the subdomain, because the weight of the sub domain name is relatively high, so there is the use of lifting the weight of the whole station, but the search engine in order to prohibit users to use this to cheat, so took measures, in addition to the need, unnecessary subdomains do not use.
7th: Malicious ads and code this has done AD League friends are very clear, such as some color color ads ah, it is best not to add.
8th: Is implicated in the right, that is, you do not go to do some have been the search engine K off site, you do this is a cheating behavior.
9th: In a large number from the message book, Forum and other mass links, especially the message book, can be said that the search engine is not considered to be a source of spam links and information. So I suggest you not do it, forum is also so, if you too much in a forum to keep your personal links, is not a good thing for you, it is easy to drop the right, if not necessary please do not go to the admin5 above leave too many links, link Riudo to your site for the light down right, heavy is k.
PS: Site by K is often the problem from the above 9. In particular, Baidu, the above requirements are universal.
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