Blockchain technology, often associated with cryptocurrencies, has gained significant attention in recent years. However, its inner workings remain a mystery to many. This overview aims to shed light on the various applications and obstacles of blockchain, drawing from available sources. Initially, blockchain emerged as a component of digital ledger technology (DLT) in the late 20th century. DLT functions as a digital database, akin to a ledger, that allows for simultaneous usage and sharing of information. This revolutionary technology has the potential to transform various industries, but it also presents challenges that need to be addressed for its widespread adoption.