A breeze is a light, cool wind. One of the nicest things about being at the beach on a hot summer day is feeling the gentle breeze off the water.
The air that blows your hair around and rustles the leaves is one kind of breeze. Another is the task that's easily completed or the job that is practically effortless: "Your dog is so good, walking him is a breeze!" You can also breeze through something that's simple and fast, like when you breeze through a math test, finishing long before your classmates.