Second auction advantages for users

Google's generally a second-price auction. So each spot higher in the order is more expensive.
Mr. Hurst[5]
Google found that advertisers using its auction-time bidding typically increased their return on ad spending by 15 to 30 percent.
Jonathan Baker[7]
Auction-time bidding makes many orders of magnitude more adjustments to keyword bids compared to intraday bidding.
Jason Krueger[6]
With the second-price auction, there is less of a need for them to worry about small changes in bids.
Dr. Juda[1]
The amount that we charge an advertiser is the least that they hypothetically could have bid while still receiving their allocation.
Dr. Juda[1]