Contoso Clothing is new to Microsoft Advertising and wants to track how many people buy a shirt online after clicking on their ad. What feature must they implement?

The selected answer option is correct because Conversion tracking is the feature that Contoso Clothing must implement to track how many people buy a shirt online after clicking on their ad. Conversion tracking allows advertisers to measure specific actions that users take on their website, such as making a purchase. By setting up conversion tracking, Contoso Clothing can monitor the effectiveness of their ads in driving sales and track how many users who clicked on their ad completed a purchase. This is achieved by placing a tracking code, known as a UET (Universal Event Tracking) tag, on the relevant pages of the website, such as the purchase confirmation page. The other options, like dynamic search ads, remarketing audiences, and audience targeting, are valuable for other campaign strategies but do not specifically track conversions like the purchase of a shirt. Therefore, Conversion tracking is essential for Contoso Clothing to measure the success of their campaigns in driving actual sales.