Decentralized identities (DIDs) are user-controlled, digital identity frameworks that utilize blockchain technology to provide secure, private, and interoperable identity verification. Decentralized identities (DIDs) are user-controlled, digital identity frameworks that utilize blockchain technology to provide secure, private, and interoperable identity verification across various platforms. Explore DIDs, their technical mechanisms, industry applications, future trends, and the challenges they face in widespread adoption. Although web3 and decentralized identities have been around for a few years, we must credit Sam Altman of OpenAI and ChatGPT fame for his pet project, Worldcoin, which truly grabbed the spotlight and shone it on this sector in 2023. The launch of Worldcoin (WLD) sparked a renewed interest in DID projects, showcasing the potential of this technology in the decentralized world of web3 and blockchain.