Since last september I've notice a strong increase in Lost IS Rank in different adwords accounts.
It's unusual.
The Ads position is high (between 1°-2°); I don't make any change in cpc and the clic/impression/ctr trends aren't change.
Why? Does anyone know something?
What do you suggest to me?
You could also check out the history of the search volume for the keyword by using a tool like Google Trends. I would imagine that if the volume of keyword searches decreases and everyone keeps their bids the same, the auctions may become more competitive and affect your impression share.