I think its the best Korean film i ever seen. Bong Joon-Ho's recent Satire of the social class division in South Korea is nothing short of incredible. The film is more or less divided into two major sections:
the first half of the film follows a Family living in the poor areas of Seoul (im assuming). After the son Ki-Woo (Choi Woo-shik) is given the opportunity to work as an English tutor in an extremely rich household, he begins to realize that despite having a great income, the adults of the family are not exactly the brightest of induviduals, and so slowly Ki-Woo and his family devise a plan to all come into the employment of their new wealthy acquaintances. Although the film may give a lighthearted impression, once the movie transitions into the second half it becomes extraordinarily twisted, slightly resembling the ending of Robert Eggers's 'The Lighthouse'.
After contemplating the events that took place witin the film, It seems obvious to me that Like JB Priestley's 'An Inspector Calls', Bong Joon-ho intends for this movie to display a clear contast between the lives of the rich and the struggles of the poor within this obviously unjust society. Of course it doesn't just rub your face with morals, and there is a very substantial and entertaining plot, but this is one of the main focuses of the movie.
As for the other, i'd say that would be the excellent dynamic between characters which is further developed by the brilliant performances from every cast member, particularly Park So-dam who in my opinion was robbed of a Best supporting actress nomination. Other notable features include some top of the line cinematography and a outstanding writing, but other than that I feel there isn't much to talk about.
Parasite is an absolute masterpiece, and like so many other films that have come out recently I absolutely recommend it.