A B+ Tree is a type of self-balancing tree data structure that maintains sorted data and allows for efficient insertion, deletion, and search operations. It is an extension of the B Tree, where all values are stored at the leaf nodes, and internal nodes only store keys to guide the search process. This structure is particularly useful in databases and file systems due to its ability to handle large amounts of data with minimal disk access. The B+ Tree is characterized by its multi-way branching, meaning each node can have multiple children. This reduces the height of the tree, leading to faster search times. Additionally, the leaf nodes are linked together, allowing for efficient range queries and ordered traversals. Overall, the B+ Tree is a powerful tool for managing large datasets effectively.