Which of the following is NOT an auction-time signal?

• A. Device type.
• B. Location.
• C. Time of day.
• D. Landing page color.

Answer: (D)

Auction-time signals are real-time context Google uses during the ad auction to determine Ad Rank. Device type, location, and time of day are these dynamic signals that can vary for each user and moment, shaping which ads win the auction. Landing page color, on the other hand, is a design detail of the post-click experience and doesn’t convey real-time user context to the auction system. It affects the landing page experience and can influence Quality Score, which then influences Ad Rank indirectly, but it isn’t used as a live auction signal.