A Universal App Campaign (UAC) is a type of advertising campaign in Google Ads that allows you to promote your mobile app across Google’s networks, including Google Search, Google Play, YouTube, and more. Here are a few examples of how you might use UAC to promote your mobile app:

1. Promote your app to people who have already shown an interest in similar apps: By targeting people who have downloaded or used similar apps, you can reach a highly relevant audience who is more likely to be interested in your app.
2. Use UAC to drive app installs: With UAC, you can set your campaign goal to be app installs and Google will optimize your ads to drive as many installs as possible.
3. Promote your app to people who have visited your website: By using the “Similar Audiences” feature in UAC, you can reach people who have visited your website and show them ads for your app. This can be a great way to drive app installs from people who are already familiar with your brand.
4. Use UAC to drive in-app actions: If your app has specific actions that you want users to take (such as making a purchase or completing a level), you can set your campaign goal to be in-app actions and Google will optimize your ads to drive those specific actions.
5. Promote your app to people who have already installed it: If you have a large number of app installs but want to drive more engagement and usage, you can use UAC to reach people who have already installed your app and show them ads to encourage them to use it more.

Overall, UAC is a powerful tool for promoting your mobile app and driving app installs and in-app actions. It allows you to reach a wide range of people across Google’s networks and optimize your ads to meet your specific campaign goals.