Abstract
A digital twin is a computerised representation of a planned or existing real-world physical framework or operation (a physical twin) that functions as a nearly identical digital equivalent system for practical reasons such as an imitation, amalgamation, evaluation, observation and administration. The digital twin was initially designed since its creation to be the basic concept for product life span management and lives throughout the whole lifespan of the physical thing it represents. This article will explain the concept of digital twin in underwater wireless sensors. The article examines various research works employing the digital twin in UWSN (Underwater Wireless Sensor Networks), and the research work explains the fundamentals of digital twins and their applications.