What are the best google ads tips for app install?

Hello, I have a global app. I want increase download with google ad but cpi is high.

Are there any tips to recude cpi for 2022?
How do you find ads keyword for app?
Is to copy campaign helpful?

If you share some tips i will be happy. I can't take downloads with low cpi.

Not much talk about app campaigns here. for your question only my 2 cents:

Are there any tips to recude cpi for 2022?
--run and adjust the price

How do you find ads keyword for app?
--use some mobile aso tools like App Annie, even google ads keywords planner

Is to copy campaign helpful?
--not for me, one will goes well and the other one shrinks

You can try Picoworkers.

Start sending installs from 3 tier countries that speak the same language you target.