There are a number of theories surrounding why dogs tilt their heads in an undeniably cute way. One theory is that when we talk to them they tilt their head to hear us better. Muscles that are used within the ear are controlled by an area of the brain that controls facial and head movement, so the head tilt is the result of your dog trying to listen to you.
A lovely black coated Labrador Retriever looking sad
Another theory is that after a few times of tilting their head, they learn that the head tilt earns them attention, as who doesn’t fuss over their dog when they tilt their head?