Network Flow is a concept in graph theory that deals with the movement of items through a network. It involves nodes (or vertices) connected by edges (or arcs), where each edge has a capacity that limits the amount of flow it can carry. The goal is often to maximize the flow from a source node to a sink node while respecting these capacity constraints. In practical applications, Network Flow can be used in various fields such as transportation, telecommunications, and logistics. Algorithms like the Ford-Fulkerson method help find the maximum flow in a network, making it easier to optimize resource distribution and improve efficiency.