Once the process is done, you will have a ‘platform-tools’ folder inside your SDK folder.
Fortunately, this is quite easy: Just browse to the SDK folder and launch SDK Manager.
When launching it for the first time, it will present you with a window to choose packages to install.
Notice that the semi-colons are necessary to separate each path variable entry from the next and previous ones.
Once you have added the path, your machine may require a reboot.
The first option begins with ‘Android SDK Platform-tools’.