All dogs love to bark, it’s their way of communicating with the world.
The pitch with which the dogs are barking can mean many things, but usually high-pitched represents positive energy, and the opposite, low-pitched barking and growling can indicate aggression or anger.
The frequency of barking also tells a story. If the dog barks in quick bursts that means it’s excited about you or something, or that it wants to tell you something urgent. Slower barking usually means less interest.
Here, you can see some of the situations in which dogs bark and what does the barking mean.