Google wrote “auction insights and impression share data now refreshes multiple times per day so you can act faster on new opportunities.”
— Google AdWords (@adwords) December 6, 2017
This will help with gaining a better understanding of whether your ads might reach more people if you make changes, such as increasing your bid or budget.
Refreshing auction insights more often can support advertisers in fiercely competitive markets. These statistics compare your performance against other advertisers contributing in the same auction.