Recently, Google announced it will be retiring the position preference bidding in AdWords.
Starting in early May, Google will be disabling the position preference for any campaigns still using it. To ensure a smooth transition for your bids, Google recommends changing any campaigns using the position preference.
Google’s reasoning behind this change is to discourage advertisers’ focus on the position of their ads on a page.
Chief Economist at Google Hal Varian found in a position metric analysis that the position of ads has no impact on conversion rates.
Those still concerned with the position of certain ads can use the automated rules for the same results. The automated rule will change your bid if your average position differs from your target position.