Showing Discomfort
Aside from feeling comfortable, dogs also yawn when they are exhausted. If they yawn in public, they hope to have an afternoon nap. On the other hand, yawning can mean discomfort and anxiety, so if you notice your dog yawning a lot in an unfamiliar place, you should take notice. They might not be that comfortable there.
Tilting Their Heads
It is common for people to speak in a higher pitch if they are talking to dogs, and sometimes, dogs tilt their heads as a response. You are not wrong if you guessed a dog does this in order to try to understand what someone is saying. Dogs can read body language and vocal cues really well and respond to what they take in, including instructions and reprimands. They can also recognize specific words, so they might be waiting for those that are associated with treats and walks! One theory suggests they tilt their heads to adjust their outer ears and have better listening comprehension.