Your colleague is the highest bidder, at $15, in a fixed first-price auction for inventory across exchanges within Display & Video 360. What will your colleague be charged for the impressions?
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Correct answer: $15.00.
Why this is the answer
In a fixed first-price auction, the highest bidder pays the exact amount of their bid if they win. Since your colleague bid $15 and was the highest bidder, they will be charged $15 for the impressions. This differs from a second-price auction (like a Google Ads auction), where the winner pays only a penny more than the second-highest bid. Options like $14.99 or $10.00 would be incorrect as they are less than the winning bid, which doesn't align with a fixed first-price model. $15.01 would imply paying more than the bid, which is also incorrect for this auction type.
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