Almost all Android devices have a Google Play store. You can officially download the app or game through it. However, because of the openness of Android, you can enjoy third-party application stores as well.
The Google Play Store is definitely the largest app store for Android users. It is also the most secure place to get applications or games for android users. But, if Google Play does not match for you, or you are interested in alternative products, there are some other alternatives.
ACMarket apps is one of the best app stores to download apps, games, and other resources for free. It performs as other stores, such as Google Play. It has a vast database where you can find official and modified editions of the most popular games or applications.
Website: https://acmarket.download/
Like the Play Store, there are many of the same applications, including Google Apps. This is also a common method for downloading locally locked applications and games. It is more safe, and it does not harm your device.
Website: https://apkpure.com/
This is an old Android application store, created specifically for open source applications. It is not very large, however, it can provide better resources.
Website: https://f-droid.org/