Why need a Motion plus wii controller?

Most popular wii games, such as Wii Sports Resort, Wii Play: Motion, The Legend of Zelda: Skyward Sword, My Personal Golf Trainer, Red Steel 2, FlingSmash and other wii games requires motion plus. And if you use it on Wii U, Wii Sports Club, Mario & Sonic at the Sochi 2014 Olympic Winter Games, are all requires motion plus. And Wii Fit U and Nintendo Land is required for some games.

Connecting instruction:

Step 1: Open your Wii console;

Step 2: Insert 2 AA batteries (not included) into the wii remote control then turn on remote;

Step 2: press the red button in the wii console for one second after you press SYNC button in the remote controller. Connection is successful when only 1 light are on (press "reset" in wii console if 4 lights do not stop flashing, repeat steps 1 and 2).