When someone says "keep in touch" do they really mean it? How do you respond when someone says that to you?

Anonymous
A female colleague who is also a friend said "keep in touch" on my last day at work. But she didn't really go ahead and share any contact details. Did she mean it or was just being nice?
When someone says "keep in touch" do they really mean it? How do you respond when someone says that to you?
3 Opinion