Troubleshooting is all about problem solving. It is the process related to finding a problem and then isolating that problem and looking into ways to possibly solve that same problem.
In the IT space, this is applied to pretty much everything, both on the software and hardware side of assets.
A simple example of troubleshooting being used is in computers, both personal and enterprise ones.
Want some simple steps to help you troubleshoot?
Standard Definition Exists?
Analyse and solve serious problems for a company or other organization. Trace and correct faults in a mechanical or electronic system.