A standard APK is the installation file for Android apps. A "Mod Menu" APK is a hacked version of the game that includes a . When you run the mod, you usually tap a floating icon (like a gear or a skull) to open a list of cheats you can toggle on or off in real-time.
Because this is a modded APK, you will never find it on the Google Play Store. Many websites offering "free downloads" contain malware or fake files. Follow this guide to find a legitimate working version. geometry dash mod menu apk android new