I am learning webmaster skills and have marked this to study in detail later. I am scratching today after having my site ranked #3 on google for my keyword to t

I am learning webmaster skills and have marked this to study in detail later. I am scratching today after having my site ranked #3 on google for my keyword to today not being found in the search results at all. I went to bing and did not have this problem. The changes Google made with the new search format last year has a lot to be desired in my book.