Which client goal appropriately matches with the use of app extension ads for a campaign?

App extension ads are designed to drive both app installs and website visits. They provide users with the option to either download the app directly from the ad or navigate to the advertiser's website. This dual functionality directly aligns with the goal of increasing app installs while also maintaining web traffic. "Drive click-to-calls" is incorrect because call extensions are specifically designed for that purpose. "Follow cross-environment conversions" is a broader measurement goal, not a specific ad format. "Track Floodlight tags" refers to a conversion tracking mechanism, not a campaign goal or ad type.