The secret to Money Heists success lies within the plot and the characters of the show as well as the producers ways of getting people to watch the show with their advertising techniques. The designers of the posters for the shows made sure to advertise the main aspects of the show, these being the masks and the red jump suits, they also made sure to advertise the most famous/main characters of the show to attract more star fans. The designers also made the genre of the show very evident, as crime dramas are a very popular genre, to attract more people using the icons of the genre. This allows for the genre aficionados to be more likely to watch the show. 

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The way the producers of the show made people actually watch the show and continue watching it was using enigmas in the middle and end of the show. These enigmas allow the viewers of the show to keep on watching, even after an episode or season had finished. This played into the overall success of the show as people actually watching the show brings in good reviews and rating, which leads to huge success money heist has turned into. The way the writers of the show keep people engaged and watching is by using the plot of the show, they do this by writing it to be a mainstream crime drama (as people like mainstream shows). The writers also create the characters of the show to be very 'relatable', allowing the viewers of the show to connect with the characters, and keep the viewers watching to see how their favorite or most loved character turns out at the end of the show.

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All these techniques the writers and producers use lead to overall success of the show (as mentioned above). The way the designers invite people to watch the show, using the posters and the way the producers and writers keep people watching and loving the show all lead to it's fantastic ratings and success.