This expression often implies deep feelings and is used in emotional or romantic contexts. In the romantic comedy, the quirky character won her heart with his unique charm.
Pro Tip 2/3
Not Literal
It doesn't mean to physically win a heart, but to appeal to someone's emotions. Despite being a rival, he won her heart with his unwavering respect.
Pro Tip 3/3
Relationships Focus
Usually implies the start or deepening of a romantic relationship. She won his heart with her kindness and sense of humor.