Why does PG-13 exist?

Why do we have the PG-13 rating? How when where?

let’s talk about one of the greatest Christmas movies of all time and the movie that started the existence of the PG-13 rating. Gremlins.

and for the promo code of the day, what movie opened the same weekend as gremlins and took first place at the box office?

#videogames #holiday #christmas #movies #christmasmovie #80s #nostalgia