An Eastern grip in tennis is one of the newer grips. It evolved from the continental grip in the 1920s. Benefits of the eastern grip include comfort in holding the tennis racquet and that it is very similar to the continental grip, which is widely known. The eastern grip is also good for hitting more aggressive shots, as the player using an eastern grip has good control of the racquet. On the contrary, western grips may be good for aggressive shots, but it is not a good grip for having comfort and control over the racquet.
Another benefit of the eastern grip is its proximity to the continental grip. If a player wants to change grips quickly to hit a front-court shot, they could quickly and easily change from an eastern grip to a continental grip, and back again.
The one drawback of an eastern grip is that it is challenging to generate topspin with that grip. But as mentioned above, one could quickly change to a continental grip for more topspin, when wanted. The eastern grip allows for flexibility and comfort when playing tennis, which is very beneficial throughout a whole tennis match.