“Beverly is our go-to person for any kind of I.T. issues.”
There's a new employee in your department. You're introducing her to some of the people in your company. Now you're introducing someone who's really helpful with computer problems.
Beverly is our go-to person for any kind of I.T. issues.
Your "go-to" is the person or thing that you usually choose. For example, your "go-to lunch spot" is the restaurant that you usually go to for lunch. You can use "go-to" like this:
That's my go-to news site.
Or you can use "go-to" by itself:
When I'm in the mood to read a good novel, Haruki Murakami is my go-to.
"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.