Checking in or also called offered attention from your dog is a foundation of training. Teaching your dog the habit of offering you frequent eye contact can make your training go a long way. When your dog looks at you for direction they are less distracted on what else is going on and more focused on you in all environments. Establishing this habit is not only great for training, it also helps build a relationship and connection with your dog.
You can start by using some of their meals to teach them that human eye contact is a good thing.
As soon as your dog offers you eye contact without you asking for it "yes" and reward it with a treat or kibble. Doing this regularly will teach your dog consistently to check in. Start in a low distracted area and keep doing it while out on walks, in your home and when out.