The majority of cases when the website suddenly drops out of delivery, optimizers explain with existence of special filters. By the way, at each search engine is own. Quite striking example to that is Google.
Instruction
1. The first of filters is a so-called sandbox of Google. It is applied to recently created websites. It is quite possible to be selected from it rather difficult, however. The fact is that this search engine uses a target rank. His idea such is that the more the new website will have links from the respected and checked websites, the more will trust you also Google. Thus you can bypass this filter.
2. The following filter from which you, perhaps, will pull out your resource it is the filter of the repeating contents (Duplicate Content Filter). It is applied only to the websites which use content already known to the searcher indexed on other Internet resources. As a rule, only site news are exempted from this filter. At detection of a similar situation the contents change urgently is required. If content is stolen from you, but not you, at first contact directly the plagiarist. Besides, contact administration of a hosting and Google, notify them on the events.
3. Link Farming Filter will be imposed if Google will see your website in any system of automatic directories of generation of links. Because of such filter the resource can not only lose positions, but also get to the ban. Output here only one: more you show consideration for that, where exactly you register your website. The fact is that there are also other directories which undergo manual moderation. And therefore there accept only the checked websites. Be insured from risk it is possible to be only in one way blocked: do not participate in similar a link exchanges at all.
4. The name of the filter of excessive optimization speaks for itself. Google can consider that the website is designed not for people, and for bots, and therefore it is possible to get into the ban at once. To avoid hit in this filter, observe moderation and be not overzealous with key tags and words.