Godot is able to export builds for multiple platforms.
Check out the official documentation here for exporting to Android.
Android exports require more effort than desktop builds.
Installing Open JDK
Make sure that you set the JAVA_HOME variable.
Run the installer and then start Android Studio
Select custom for the install.
Most options should be ok as is.
Accept the licence agreements.
Allow Android Studio to install.
Restart your computer.
Enabling the building of unregistered Android apps
Android also needs a key to verify and allow installation of the builds that aren’t released on the Android Play Store.
Open a command prompt and run the following command
keytool -keyalg RSA -genkeypair -alias androiddebugkey -keypass android -keystore debug.keystore -storepass android -dname "CN=Android Debug,O=Android,C=US" -validity 9999 -deststoretype pkcs12
Go to Editor > Editor Settings
Scroll down to Export > Android.
Enter the folder where you installed the Android SDK.
On windows this is often:
Make sure that you add the actual path and not the %LOCALAPPDATA% reference to it.
You also need to set the .keystore file. This is in the folder that you created it earlier.
You can move this file to another location
Find the file and set it.
Note that this keystore is only used for debugging and developing our apps. It cannot be used for production releases.