"I.T." is an acronym for "Information Technology". People use this phrase to talk about computers, computer networking, databases, and so on.
Many companies have an "I.T. department" which manages the company's computers. The I.T. department helps employees with "I.T. issues", which are problems with things like email, passwords, printers, wi-fi, etc.
If you have any I.T. issues, call Jared. He's good with that kind of stuff.