A Suffix Tree is a data structure that represents all the suffixes of a given string in a compact form. It allows for efficient searching, substring matching, and various string operations. Each path from the root to a leaf node corresponds to a suffix of the string, making it easy to explore all possible endings of the string. Suffix trees are particularly useful in applications like bioinformatics, where they help in analyzing DNA sequences, and in text processing, where they enable quick pattern matching. Their construction can be complex, but they significantly speed up operations compared to naive string searching methods.