Damsel in Distress (or Distressed Damsel) is the classical beautiful and helpless maiden waiting for her hero to come and save her from the villain.
While it is a very old and still actively occuring character type, in modern times, the stereotype of damsel in distress is highly attacked by the feminists. However, the most recent damsels don't merely wait for their heroes and do try to fight for themselves, earning a more positive light. Also, many damsel in distress grow tired of being always saved by their men, and would work themselves out to become stronger.
Being a Damsel in Distress usually involves these occurrences:
The heroine lands ina perilous situation or circumstance that the hero or another character has to help her out of that raises the stakes (Rosy from Balto, Connie Evans from The Good Son, Gabrielle Delacour, Ginny Weasley and Luna Lovegood from Harry Potter, Princess Aurora from Sleeping Beauty, Soo Yung from Rush Hour)
The heroine constantly finds herself in certain situations where she needs rescuing (Gosalyn Mallard from Darkwing Duck, Ann Darrow from King Kong, Amy Rose from the Sonic the Hedgehog franchise, Hermione Granger from Harry Potter, Lois Lane from the Superman franchise, Mary Jane Watson from Spider-Man, Daphne Blake from the Scooby-Doo franchise, Princess Peach from the Super Mario franchise)
The heroine gets caught up in danger and must save herself (Rey from Star Wars, La Petit Ballerina from Tom and Jerry: A Nutcracker Tale, Kayley from Quest for Camelot)