Relational Algebra is a formal system used in database management to manipulate and query data stored in relational databases. It consists of a set of operations that take one or more relations (tables) as input and produce a new relation as output. Common operations include selection, projection, union, and join, which allow users to filter, combine, and reorganize data effectively. The primary goal of Relational Algebra is to provide a foundation for querying databases in a systematic way. It serves as a theoretical framework for SQL (Structured Query Language), enabling users to express complex queries and retrieve meaningful information from large datasets efficiently.