Rooting androide can be tricky.

Her is a tips trick to a Rooting

possible search word. Xda is the best forum.

if u have a Samsung 5 s. Goggle Samsung 5s rooting.

You wil find guide. If harder development like google Rooting huawei y625-u . Xda always best. Z4root is a older rooting apk. Supporting older android models running 4.4.2 Remember backup. Abd usb drivers. Odin is a good tool for Samsung. Adb is betther butt you must read. More to use safely, by fbe way all tools i software running on abd and fastboot flashtool. Always install a good cwm recovery first. Cwm recovery use it to update the androids phone. Unlock bootloader first then flash back to stock room. Always flash back to stock first. Some shops selling mobile custom shitt rom, apps u dont want impossible to delete before root. Android secret upgrade to development mode usb debugging. Try system . Phone-model then 7 times on build-number you will see 7 6 5 3 2 1 developer-mode active.

iroot A newer one.
Z4root kingooroot Even newer. cwmroot Cyanogenemod recovery.

http://kingoroot.org/
http://irootdownload.net/
https://forum.xda-developers.com/showthread.php?t=833953
https://forum.xda-developers.com/android/development/guide-firmwares-roms-cwm-root-acer-mtk-t2945933
https://forum.xda-developers.com/showthread.php?t=2649691
https://autoroot.chainfire.eu/
http://mobileodin.org/
https://www.oneclickroot.com/
https://www.oneclickroot.com/downloading-usb-drivers-for-android/
https://androidmtk.com/download-mobileuncle-apk
https://forum.xda-developers.com/wiki/ClockworkMod_Recovery