Cracked APKs are essentially modified versions of the original apps that are available on the Google Play Store. These modified apps are illegally altered to remove limitations, unlock premium features, or remove advertisements without having to pay for them. However, downloading and installing a cracked APK is not recommended as they come with risks such as malware or viruses that can harm your device. In addition to the risks, using a cracked APK violates the app developer's terms of service and is considered piracy. It's important to support app developers by purchasing the apps through the Google Play Store to ensure that they are getting the revenue they deserve for their hard work.