Haptics
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Haptics or Tactile feedback is a technology that produces the sense of touch through physical stimulation. Haptics can improve the user's immersion in a VR world. It allows users to experience physical sensations caused by their actions in a virtual environment. When a user picks up a cup in the virtual world, the user should feel the realistic sensations of a cup in his or her hand. Even though the cup is not present in the real world.
In traditional video game controllers, "rumble" is often used to produce tactile feedback.