How enable Android Debug Bridge (ADB) in Acer Iconia B1-A71

When you connect your Acer Iconia B1-A71 Android device to your laptop, in my case Windows laptop, the device chooses one connection method (Media device MTP) and installs drivers for that functionality.

Useful, but not necessary step: 
When still connected with USB, drag down the top status bar, and you can see the text "Connected as a media device". Click the text, and you can change the connection method from Media device to Camera (PTP) mode. Change the connection type and windows will install yet another bunch of drivers.

The most important step:
Now go to the Settings > Developer Options and enable the developer options by sliding the top most button to right. Now select USB Debugging to be active. Windows will now download the drivers for ADB. Wait for the drivers to be installed and then test the connection.

Test the connection:
Open command prompt and type:  
adb devices

You should see something like:
List of devices attached
C4F12260AFFF58F device

Type command:
adb logcat
And you will see the output from the device.

Windows has finished installing drivers.