So you have been sitting on the first page of Google for some time now, and all of a sudden your page drops from out of nowhere. All of your traffic is down, no one can find your site, and you are worried that you have been banned forever.
If this sounds like you, don't be alarmed, there are a few reasons why this may have happened. The first reason is simple, if you are building backlinks to your site right now, you are in the so called "Google Dance". By definition, the "Google Dance" is when your site quickly drops from the rankings, but you are still indexed in the search engines. This happens for a number of different reasons.
First, when you are building backlinks, Google will see your site has gaining popularity or spamming. Thus, they will drop your page in the SERPS in order to be sure that you are not just trying to get fast rankings. It's best to wait a few weeks, and you should see your site back up on top.
Another reason why your site may have dropped from the search engines is because Google has just made a change in their algorithm. If this is the case, you may have to be a little worried. If they have made a drastic change, there is a good chance that your site has been affected. Thus, your rankings will not come back without the proper structure and design that Google wants it to be.
In order to fix this, simply go go Google's help desk and ask them various questions on how you can improve their site. More times than not, you will be able to get your site back up and running again.