A search tree is a data structure used to organize and manage data in a hierarchical format. It consists of nodes connected by edges, where each node represents a value or a decision point. The top node is called the root, and each node can have zero or more child nodes. Search trees are commonly used in computer science for efficient searching, sorting, and data retrieval. One popular type of search tree is the binary search tree (BST), where each node has at most two children. In a BST, the left child contains values less than the parent node, while the right child contains values greater than the parent. This structure allows for quick searches, insertions, and deletions, making it a fundamental concept in algorithms and data management.