Your client is launching a new generation of mobile phones. They have a separate display ad for each of the three models and want to show the ad that leads to the most purchases more often than the other two models, which aren't performing as well. What type of Display & Video 360 creative optimization would you use to achieve that goal?

In Google Display & Video 360, when an advertiser wants to automatically show the best-performing creative more frequently based on actual user actions like purchases or sign-ups, they should use Optimize for conversions. This optimization uses machine learning to evaluate which ad variations are most effective at driving the desired outcomes and adjusts delivery accordingly, ensuring that higher-converting creatives receive more impressions. Other options like optimize for clicks or creative rotation focus on engagement metrics or even rotation, not directly on conversion performance. Therefore, the correct answer is Optimize for conversions, because it aligns ad delivery with the ultimate goal of increasing purchases for the new mobile phone models.