Answer:
Buddhism was a religion that was absorbed and synthesized into local cultures, rather than exporting the culture of its home. For example, while Buddhism brought with it a particular spirituality and philosophy, Buddhism in China became Chinese, rather than China becoming Buddhist and Indian. The result was that the artistic traditions of a given country have strongly influenced Buddhist art, which are sometimes starkly visible, as in the comparison of the severe Japanese depictions of the Buddha with the serene Buddha of Laos or Thailand. Despite these specific cultural artistic traditions, some fundamental standards for Buddha statues remain a constant, and among these are the various poses of the Buddha and what those poses mean. These poses are called mudras.
Significance
Mudras are ritualistic gestures and poses that are used in both Buddhism and Hinduism, reflecting their common Indian heritage. All statues of the Buddha represent him performing one of the mudras. Many of the mudras are depicted through simple hand gestures, but others are full-body poses.
Types
The five most common mudras are the Abhaya Mudra (right hand raised and palm facing out, with the left hand down toward the hips and also facing out, symbolizing peaceful intentions and peacemaking); the Bhumisparsha mudra (all five fingers of the right hand reaching to touch the ground, symbolizing the enlightenment of the Buddha under the Bodhi tree); the Dhyana mudra (one or both hands in the lap, symbolizing wisdom, possibly supplemented by ritual objects such as an alms bowl); the Dharmachakra mudra (the thumb and index finger of both hands touch at their tips to form a circle, symbolizing the Wheel of Dharma); and the Varada mudra (both hands at waist level, palms out, right hand up and left hand down).