I'm not sure what data is used by my game If I use Construct's inbuilt Mobile Advert, Google Play & Mobile IAP plugins. Can anybody explain me what data these plugin use from users.
To check the data types that google play wants you to give information about: support.google.com/googleplay/android-developer/answer/10787469
scroll down and there is a list.
BUT if you are only using the 3 plugins you mentioned, you can check that you are not collecting any data, since you are not using analytics tools or authentication tools to collect anything, you are not collecting name,number or anything.
When it comes to IAP im not 100% sure, but i think that is managed by Google Play, so again i dont think you need to check that. You might have to check that you are collecting data on the purchase but since its google play im not sure there i dont think you need to since you are not saving it to anything else than google play.
You check that you are collecting data only if you have for example, analytics, getting players location etc.
Anyways, just send in your app for review if you are not sure, google will answer you if anything is wrong and tell you what to do.
Good luck !