Boolean Retrieval is a method used in information retrieval systems to find documents based on specific criteria. It employs Boolean logic, which uses operators like AND, OR, and NOT to combine search terms. This allows users to create complex queries that can include multiple keywords, helping to refine search results. In Boolean Retrieval, documents are typically represented as sets of terms. When a user inputs a query, the system evaluates which documents match the criteria based on the specified operators. This approach is effective for filtering large datasets and retrieving relevant information efficiently.