At a glance: If you are looking to start running UA for your mobile game, try out the Kick-off Strategy to execute a global campaign at scale with Bid Automation.
Objectives:
To run a global campaign efficiently
Identify countries with the potential to increase installs
Pay the right CPI that brings conversions
The Set Up:
Have a Google or Unity global campaign in place
Set your campaign with the lowest bid for each country
Then, set Bid Automation in Cost Center to run daily by increasing bid slowly for each country until it can spend
Optional: You can set it higher increment for Tier 1/2 countries to save time