A Linked List is a data structure that consists of a sequence of elements, called nodes. Each node contains two parts: the data it holds and a reference (or link) to the next node in the sequence. This allows for efficient insertion and deletion of elements, as you only need to update the links rather than shifting all elements, as you would in an array. Unlike arrays, which have a fixed size, a Linked List can grow and shrink dynamically. This flexibility makes it useful for applications where the number of elements is not known in advance. Common types of linked lists include singly linked lists, doubly linked lists, and circular linked lists.