Aşağıda Google'den bazı ban sebebleri yazmaktadır, ben konumuza dair olanı yazacağım Caesar arkadaşımız icin;


Link Farming

Link Farms, or Free-for-all links pages exist solely to help listed sites gain higher search engine rankings. These are bad neighbourhoods and are frowned upon by the major search engines. Obviously you can't control which sites link back to you, but you can ensure you don't link to link farms.

Excessive Links

Now that so many webmasters are more obsessed with their Google Pagerank than the amount of quality traffic they receive, link pages are fuller than ever. You should try not to place too many outbound links on a single page. If you do need to link to 100 or more sites, place the links on separate pages.

Cloaking

Seen by many SEO specialists as probably the thing most likely to result in a Google ban, cloaking involves creating one page designed specifically for the search engines, and another which will appear for the user. This is search engine manipulation at its worst.

Selling PageRank

Some sites have gone so far as to sell PageRank - i.e. selling links on highly ranked pages. You can sell links (i.e. advertising), but you cannot sell links for the stated purpose of increasing Google Pagerank.

Doorway Pages
A few years back, doorway (or gateway) pages were as common as normal pages - these are usually small pages, crammed full of keywords, designed solely for the purpose of gaining high rankings. They usually look awful and a site which uses a lot of doorway pages is likely to be penalised.

Excessive Cross-Linking

Some webmasters create multiple site, often with identical or similar content. They are then heavily linked together with the sole purpose of increasing Pagerank. Not recommended. If you have several sites, inter-linking is fine, but in moderation as with all search engine marketing techniques.

Submitting multiple URL's from the same site

An example would be for a webmaster to submit mysite.com and mysite.com/index.html to the Google database, thereby essentially trying to get two search results for the same page. If Google doesn't find a new site quickly anway, just submit your index page ONCE!

SEO Software

Don't use unauthorised computer programs to submit pages, check rankings, etc. Such programs consume computing resources and violate Google's terms of service. Google does not recommend the use of products that send automatic or programmatic queries to Google.

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Cloaking, kısaca sayfaların arama motorlarına ve gercek (insani) ziyaretciye farklı sayfaların gosterilmesi anlamına gelir.

IP adresinizden veya kullandığınız Browserin verdiği "User Agents" bilgisi ile sayfaya gelen ziyaretcinin gercek mi yoksa arama motoru (Orumcek / Crawler / Spider) olduğu anlaşılmaya calışılır.
Eğer gelen ziyaretci arama motoru (Orumcek / Crawler / Spider) ise arama motoruna belli anahtar kelimeleri (Keyword) iceren, arama motorları icin optimize edilmiş sayfalar gosterilir. Gelen ziyaretci gercek (insani) ise sayfanın arama motoru icin optimize edilmemiş , ziyaretciyi gercekten ilgilendirebilecek ve bilgi iceren normal sayfalar gosterilir.

Cloaking bircok arama motorlarının kullanım şartlarına aykırıdır ve tespit edildiğinde ilgili sayfa/site 'nin Arama Motoru İndeksinden (Veritabanından) cıkarılmasına sebep olur.

Arama Motorları Cloaking yapıp yapmadığınızı nereden bulur diye soracak olursanız bunun nedeni Arama Motorları calışanlarının sitenizi kontrol etmiş / ediyor olması olabilir. Bunun ziyaretci istatistiğmizi tuttuğumuz veritabanında yaptığımız bir araştırma sonunda Arama Motorlarına ait Robot (Orumcek / Crawler / Spider) ların User Agenti normal bir ziyaretcinin bilgisiyle siteyi ziyaret ettiğini gorduk. Bu da kullandıkları başka bir yontem olsa gerek.