I'm looking for a definition for concurrent users for some non technical members of my team.
I did a google and end up getting confused myself. LOL :)
Concurrent users is related to the number of users that are running at a time.
If you run a load of 5 VU's then you will have 5 concurrent users. This is different from the total number of virtual users executed which can be higher. Think about users that are stopped and restarted for example.