I have set up unity analytics and unity advertisement and Facebook SDK on my android game, I have published it several times and it got suspended two times, I don't want to risk anymore so I wanted to know if I should write a private policy telling the users why I use unity and stuff? Thank you in advance :)
You need a privacy policy, but you don't necessarily have to write one yourself. On the Unity forums, if you're using Unity Analytics and Unity Ads, they recommend using the following link for your privacy policy when publishing to the Google Play Store:
https://unity3d.com/legal/privacy-policy
I use it for my game, and I've never had a problem.