Which three factors impact a Search ad's auction-time ad quality?

The selection is correct because ad relevance, expected clickthrough rate (eCTR), and ad landing page experience are the three core components that determine a Search ad's quality during the auction. Ad relevance measures how closely your ad matches the intent behind a user's search query, ensuring that users see helpful information. The expected clickthrough rate is a prediction of how likely your ad is to be clicked when shown, based on its historical performance and the search's specific context. Finally, ad landing page experience assesses the utility and navigation of the destination website, rewarding advertisers who provide a seamless and transparent transition from the ad to the final action. Together, these factors allow Google to prioritize high-quality, useful ads over those that simply have the highest bid, directly influencing your Ad Rank and overall campaign efficiency.