If you're seriously interested in the magic of Heinz Ketchup, this New Yorker longread by Malcolm Gladwell from 2004 remains the benchmark-
https://www.newyorker.com/magazine/2004/09/06/the-ketchup-co...
https://www.newyorker.com/magazine/2004/09/06/the-ketchup-co...
http://revisionisthistory.com/episodes/19-mcdonalds-broke-my...