Filter – SEO WIKI
A filter is a special algorithm that is applied by the PS to sites using “black” promotion methods and manipulating search results. Different search engines have their own filters that filter out low-quality sites, excluding them from the search results.
Search robots regularly check the web resources of the Internet for the use of unfair methods or poor-quality optimization. In most cases, search engines do not notify site owners before applying a filter. You can find out about the filter imposed on the site only by some signs, which include:
The loss of pages from the index;
The absence of a site in search results for key queries.
Two popular search engines are represented in the United Kingdomn segment of the Internet: Google and Yandex.
Well-known Yandex filters:
AGS – the filter is superimposed on web resources that sell links, as well as satellites.
Nepot filter – superimposed on sites that abuse link sales and use link spam. Under the influence of this filter, outgoing links stop transmitting their weight, so their further sale is simply meaningless.
You are the last – the filter is superimposed on the resource pages that have content that is nonunique or copied from other sources. These pages go down a lot in search results.
Redirect filter – applies to doorway websites that use redirects to other resources. Such sites fall into the black sheet of Yandex.
Affiliate filter – superimposed on the site and its affiliates so that only one web resource is present in the search results that most fully meets user requests.
You are spammy – it serves to combat unscrupulous sites that use a large number of keywords on the page. With spam, such pages are excluded from the issuance of Yandex.
Famous Google filters:
Sandbox (sandbox) – the filter is superimposed on new sites whose age is no more than six months. When applying such a filter, promotion by high-frequency keywords does not make sense, and optimizers should focus on low-frequency keys. The sandbox is temporary and usually sites are exposed to this filter for no more than three months.
Bonding (bombing) – the filter is superimposed on sites that have the same anchor on the links. Such sites are excluded from the issuance of Google.
Links – the filter is applied to those sites that have a page for exchanging links.
Minus 30 – sites using redirects, cloaking and other “black” promotion methods go down 30 points in Google search results.
Duplicate content – sites that have non-unique content are excluded.
Sociating – if donor sites that are not relevant to the topic or violate PS rules link to the resource, the weight of such links is not taken into account.
Many links – the filter is superimposed on web resources, on which a sharp increase in the link mass is seen. Google perceives a sharp increase in links as an attempt to manipulate the issuance and such sites fall under the ban.
Download time – too long page loading time negatively affects the promotion, respectively, Google reduces or excludes such resources from the issuance.
Reoptimization – the filter is applied to sites whose pages are saturated with keywords and phrases.
Broken links – if the search robot can’t index the links on the page or they lead to non-existent resources that violate the rules of the PS, then this site is reduced in search results.
Omitted results – the filter is superimposed by a combination of factors, which include: non-unique content, a small number of external links, identical page titles, lack of internal linking, and so on.
Additional results – the filter is applied at the discretion of the search engine robot. If he considers that the site does not adequately respond to a user’s request, then it will be reduced in the issuance.