MST, or Minimum Spanning Tree, is a concept in graph theory that refers to a subset of edges in a connected, undirected graph. This subset connects all the vertices together without any cycles and with the minimum possible total edge weight. MST is useful in various applications, such as network design and optimization. There are several algorithms to find an MST, including Kruskal's algorithm and Prim's algorithm. These methods efficiently determine the minimum set of edges needed to connect all points in a graph, making them valuable in fields like computer science, telecommunications, and transportation planning.