I think the issue is the work I do isn't seen by upper levels. It's all "behind the scenes". People always ask something of me or they need help and I always do it. It may not be an official task but it puts fires out. I think my manager needs to know that.
Start keeping a log of everything you do, especially those tasks that are outside your responsibility, helping others, etc.
Next, Plan out a project or two that you would be in charge of that, ideally, would take little effort or resource from the company. For example, though we have financial reports at my company, there aren't many good roll-ups/dashboards/high level reports for the guys I'm supporting. I threw together an excel sheet I can update easily monthly with financials as they come in.
In a more general case, it might be trying to improve a procedure, or taking some initiative to developing a tool or such.
If they are talking communication and visibility, sounds like they want you to not just be a support for other people, but to strike out more for yourself.
Oh, and that log. Once a month or once a quarter, go over it with your boss. Book an hour with him/her and show they what you've been doing extra and get some input on how to help situations, better respond, or how they might view the situation. Bear in mind that your boss will only know about the work they give you, unless you let them know you are taking on more yourself. The log shows the extra time and help your giving. The projects would show how your trying to advance yourself and your position.
Now, all THAT said, when you meet with your supervisor, try to get a read how they are presenting this. Is it to push you to do better and advance yourself, is it a response to possible stagnation on your part, is it them not recognizing the effort you put in, or, and the most critical, is it a pretext for later action on you. If you feel its the latter, start looking for a new job, immediately.
And a final point, sometimes this judgments are not personal. I worked for a large organization a few years back and, to cut down on raises, they 'unofficially' forbade any supervisor from giving better than satisfactory ratings, and pushed for at least a couple of unsatisfactories.