The Microphone is designed to be best used for Vocals, Thats why it uses Cardioid Pattern.
The Cardioid Pattern is the best for vocals, as the Microphone sensitivity is highly reduced from both sides, the back and the top side. While the Sensitivity is at its peak of a -38db at the Front side.
This means, when you speak to the microphone from its front side, and there are other noises received from the microphone other sides, they will be highly reduced in respective to your sound.
The picture illustrates Arrows where the microphone is at its highest sensitivity, Where the Blue arrows indicates where you shoud point the sound source to.