Our website www.direct-electricals.co.uk has been getting very good
results for the past 5 years but has suddenly seemed to drop of the
index with very poor results on our business. Can you please explain
why this should be and also check to make sure that we have not been
penalized for anything that we may not know about as google is a  very
important part of our marketing. Many Thanks...    Martin Strange

www.direct-electricals.co.uk has experienced the Google Dance.

http://dance.efactory.de/

The name "Google Dance" has often been used to describe the index
update of the Google search engine. Google's index update occurred on
average once per month. During an index update there was significant
movement in search results and Google showed new backward links for
pages. However, in mid-2003 Google started to update it's index
continuously. It appears that, still, there has to be an update of the
complete index once in a while and during this time new backward links
are shown. But, because of the continuous update, the effects on
search results seem to be rather insignificant.

We will keep this site up running because it provides some information
beyond the Google Dance. But there will no longer be a monitoring of
updated data centers during a "Dance".