Approx 6 months ago I went from the #2 position to the #1 position for my main term 'business for sale' (after holding the #2 position for approx 3 years). I also held the #1 position for my second biggest term 'businesses for sale' for the last 3 years.
On Saturday 7th Jan 2012 my site dropped to #7 for both of these terms. Highly unusual for such a big drop. All othe sites on page 1 simply moved up 1 spot (because I went down). I haven't done anything out of the norm to my site other than launch a mobile version the day before my drop in the serps, which I have eliminated as a cause.
I am scratching my head! Could I have been penalized?
I can't believe this has happend to my site. I've seen threads like this before and always thought they must have been doing something wrong. I've been consistantly holding my top rankings for years and for Google to kick my ass like this doesn't make sense.......