postgis - How to find the best route through multiple points?

I am using postgreSQL, postGIS and pgrouting. Now I am really confused on how am I going to find the shortest path between multiple points.

I know how to find it between two points through dijkstra but I am confused how to accomplish the same result with more than two points.

I have done some research and found this: https://github.com/pgRouting/pgrouting/wiki/One_to_many-Dijkstra---To-review

But still I did not understand if its the right way and how to install it.