In March, Google announced it will shift to first price auctions for Google Ad Manager, its ad server and publisher exchange, by year end. On Friday, it issued an update with some additional details on the transition. How auctions on Ad Manager run now. Currently, there may be two different auctions run for a specific ad. A second price, real-time bidding auction runs among Authorized Buyers, which include Google Ads, Display & Video 360 and other DSPs. That’s then followed…