Windows:-

Source:- xda developer

Download Adb Installer
Size 9.18 MB
Run it with Administrator Privileges
Press Y/Yes to install ADB and Fastboot or N/No to skip
Press Y/Yes to install ADB system-wide or N/No for current user only
Press Y/Yes to install Drivers or N/No to skip
Continue Driver installation
Finished!

Download Adb for Windows

Linux:-

Debian-based Linux [Ubuntu, Zorin, Ubuntu based os]
Open terminal and type
sudo apt-get install adb

Fedora/SUSE-based Linux
Open tarminal and type
sudo yum install android-tools

Phone/Tablet Setup:-
You need to enable USB Debugging for Use Adb.

Tutorial:-