The document discusses inserting a node into a linked list after a given node. It describes linked lists as a linear data structure that stores multiple values in nodes connected by pointers. The algorithm for inserting a node after a given node is presented: 1. Find the node before the given node by traversing the list and comparing node values 2. Set the next pointer of the new node to the node after the given node 3. Set the next pointer of the node before the given node to the new node This inserts the new node between the node before and after the given node in the linked list.