Description: A reputation system is a mechanism that evaluates and ranks the reliability of participants in a network, whether in the context of digital environments or decentralized systems. This system allows users to interact more safely and efficiently, as it provides information about the reliability of other participants. In digital environments, where interactions are often virtual and may involve economic transactions, a reputation system helps mitigate the risk of fraud and malicious behavior. Moreover, in decentralized systems, such as those used in cryptocurrencies, reputation can influence transaction validation and reward allocation. The main characteristics of a reputation system include transparency, immutability of records, and the ability to adapt to user actions over time. The relevance of these systems lies in their ability to foster trust in digital ecosystems, where identity and veracity can be difficult to verify. As digital technologies continue to evolve, reputation systems become essential tools for ensuring safe and effective interactions among users.