1.The earliest manifestations of google banning are usually first noticed by the webmaster as a sudden and severe drop in the number of website visitors and when the webmaster tracks the referrers of his visitors, he will not find anymore visitors coming to his site from google.

2. Sudden drop of the google PageRank of all pages of the website from any level to 0.

The combination of the above 2 symptoms is highly suspicious for google banning specially if they occur suddenly to an "old", established, high ranking website. In case of "newly born" websites, the diagnosis may be difficult depending on the above manifestations alone as these manifestations may be normal and transient for new sites which have not been indexed by google yet and so their pagerank is still 0. In this case, we need an "urgent" diagnostic test.

Diagnosis:

The diagnosis of google banning is very easy, even for new sites that have not been indexed by google yet. The diagnosis is made by a simple, accurate, and rapid test:

Test: Provided the site suspected for google banning is called www.suspected-domain.com, do a search in google for www.suspected-domain.com.

Results and interpretation: if www. suspected-domain.com is banned, google will say: "Sorry, no information is available for the URL www.suspected-domain.com" WITHOUT a direct link to www.suspected-domain.com. This sign differentiates between banned sites and new non-indexed sites. In the later case, there will be a direct link to www.suspected-domain.com, and google search results will say: "Sorry, no information is available for the URL www.suspected-domain.com" followed by "If the URL is valid, try visiting that web page by clicking on the following link: www.suspected-domain.com". This sign is absent in banned sites.

Complications:

Google banning is an infectious disease; all sites linking to the banned site are at a risk of catching the banning. So it is usual that many link partners escape and on the long run, the site will lose many of its inbound links.