Open your File Manager, find the downloaded APK, and tap install.
If your device gets stuck on the logo, you may need to flash the original firmware using a tool like Odin (for Samsung) or SP Flash Tool (for MediaTek). Safety Disclaimer root android 810 apk link
Kingo Root is one of the most famous names in the rooting scene. It has a high success rate for devices running Android 8.1.0, especially for brands like Samsung, LG, and Motorola. Open your File Manager, find the downloaded APK,
Install the Xposed Framework to change your UI beyond what settings allow. Open your File Manager