Tongue posture plays a key role in healthy breathing, facial structure, and oral function. The correct position is to rest the tongue gently on the roof of the mouth, with the entire tongue—not just the tip—making light contact. Lips should stay closed and breathing should occur through the nose. Proper tongue posture helps support nasal breathing, reduces mouth breathing habits, and may improve jaw alignment over time. Poor tongue posture can contribute to open-mouth breathing, snoring, and discomfort. Practicing awareness during the day, along with exercises like “mewing” or myofunctional training, can help retrain the tongue for optimal resting position and breathing.