The heart shaped face is recognized by the narrow jawline ending in a pointed chin. The forehead is wider than the jawline. Sometimes also referenced as a reverted drop shape.
It is a softly shaped face so be careful with chunky and distinguished square shapes. They will often be too overwhelming for the heart shaped face. Hybrids with a squarish browline and a soft rounded lower rim like pantos would be perfect. A soft cat eye will also work greatly. Especially if you wish to emphasize a feminine look. And the oval if you are into this shape. It is a little daring for many people, but you should really try it on. It adds such a great, elegant touch to your appearance.