Explanation
Where to Use MST This diagram shows a common design that features access Switch A with 1000 VLANs redundantly connected to two distribution Switches, D1 and D2. In this setup, users connect to Switch A, and the network administrator typically seeks to achieve load balancing on the access switch Uplinks based on even or odd VLANs, or any other scheme deemed appropriate.
https://www.cisco.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/24248-147.html