What exactly is a Production Support?

I am currently searching senior profiles within Production Support within infrastructure stream.

Can anyone tell me - what exactly production support means? What these guys exactly do?

Regards,
Sarang

Production support personal provide assistance for systems in production. For example, if a company has a web application that's deployed and available to the public and something goes wrong, the production support staff figures out what's wrong, and may provide a fix as well. It might also entail re-running back-end jobs that failed (for example in a banking position the bank might get files to process throughout the day).

It really depends on the nature of the applications/processes in place, but basically production support is the front line of defense when things go wrong.