This column displays an estimate of the average position your listing may achieve on the results page, based on your bid and the historical bids of other advertisers. If you enter a new bid in the Max bid column and click Update Bids, the estimated average position will also update. It is displayed as a decimal because it is a forecasted average based on historical data and not an actual snapshot of your current position.

To forecast your estimated position for a keyword, change your max bid and click the Update Bids button. (For example, if your keyword bid is $0.10 and the estimated average position is 4.6, increase or lower the bid and click on the Update Bids button to see how your estimated average position is impacted.)