Okay, so first let's think about doctors. Doctors are people who help us when we're sick, right? Well, there are lots of different kinds of doctors, sort of like how there are different kinds of ice cream.
So when we talk about "specialty," we're talking about one of those different kinds of doctors. It's like saying "chocolate" or "strawberry" instead of just "ice cream."
Now, sometimes a doctor will focus on one particular part of the body, like the eyes or the heart. Other times, they might focus on one particular kind of sickness, like cancer or diabetes.
When a doctor decides to focus on one particular thing like that, we say they have a specialty. It's kind of like how some people really love dogs or cats, and they learn everything they can about just those animals.
So if we have a bad heart, we might go to a "cardiologist," which is just a fancy word for a doctor who specializes in hearts. And if we have a problem with our eyes, we might go to an "ophthalmologist," which is a doctor who specializes in eyes.
Does that make sense? It's like having lots of different flavors of ice cream, but for doctors!