Commonly referred to as Java Plum, Blackberry, Black Plum, or Jambul, JAMUN (Syzygium cumini) is a huge, glabrous, evergreen tree that grows in Australia, Malaya, Sri Lanka, and India. The trees bear rectangular or ellipsoid berries every year. When fully ripe, they turn purple black, yet when raw, they are green. The ripe fruits taste rather tart and sweet. According to studies, the berries are rich in minerals, carbohydrates, and pharmacologically active phytochemicals such anthocyanins, terpenes, and flavonoids. Among the several compounds included in the plant are anthocyanins, glucoside, ellagic acid, isoquercetin, kaemferol, and myrecetin. The seeds are said to contain the glycoside jambolin or antimellin and the alkaloid jambosine, which prevent starch from being converted to sugar diasterately. The database's extensive collection of literatures shown that extracts from various jamun sections exhibited notable pharmacological effects. A plant noted for its ethnomedical applications is jamun. Numerous pharmacological properties, including antibacterial, antifungal, antiviral, antigenotoxic, anti-inflammatory, anti-ulcerogenic, cardioprotective, anti-allergic, anticancer, chemopreventive, radioprotective, free radical scavenging, antioxidant, hepatoprotective, anti-diarrheal, hypoglycemic, and antidiabetic effects, have been demonstrated by scientific studies to be present in the different extracts of jamun. Bark, seed, and leaf extracts are too helpful in the management of diabetes. The primary focus of this review is the medicinal value of jamun plants and how they can be used to treat a range of illnesses.