Open Source Routing Machine (OSRM) is a tool that helps people find the fastest or shortest way to get from one location to another. It does this by looking at the roads on a map and figuring out which roads are the best to take. OSRM looks at things like the distance between roads, how many turns there are, and how many cars are on each road to figure out the quickest way. By using OSRM, you can get directions to wherever you want to go in the quickest way possible.