need help..!! adwords universal ad campaign

i am running android app install campaign which is now the universal ad campaign in google adwords.

question: i want to show my app ad in google playstore when people search related keyword. how to bid for the app so my ads shows in playstore. ..?


( in universal campain, you cant select the placement . adwords algo. decide where to show the ads .. in youtube, in display network or in playstore )

>> when we set the universal ad campaign, we can provide 4 texts for the campaign and the ads are generated by the system. ( look or snipet of ad)


anyone have experience with app installs. please help.