Boyce-Codd Normal Form (BCNF) is a type of database normalization used to reduce redundancy and improve data integrity. A table is in BCNF if, for every functional dependency, the left side is a superkey. This means that no non-trivial functional dependency exists where a non-superkey determines another attribute. Achieving BCNF often involves decomposing tables into smaller ones while preserving the original data. This process helps eliminate anomalies during data operations like insertion, deletion, and updating. By ensuring that each piece of data is stored only once, BCNF contributes to a more efficient and reliable database design.