MongoDB (when using transactions)

MongoDB is a popular database that stores data in a flexible, document-oriented format. When using transactions in MongoDB, it ensures that a series of operations are completed successfully as a single unit. This means if any part of the transaction fails, none of the changes are saved, helping to maintain data consistency. Think of it like signing a contract: you either sign it completely or not at all. Transactions make it easier to manage complex actions involving multiple pieces of data, ensuring that the information remains accurate and reliable.