It's said that late Ramoji Rao, who made movies under Usha Kiran Movies, was one of the very few producers in India to screen his movies for "test audiences" much before the theatrical release. He used to get a questionnaire prepared to get pointed, specific feedback from them. Consequently, changes would be made to the script and some scenes were reshot.
This is a time-tested Hollywood model. Hollywood producers/studios check if the audience understands the "why" behind a character's actions. For example, in the original pilot for Game of Thrones, test audiences didn't realize Jaime and Cersei were siblings, which made their relationship confusing rather than shocking. This is also a prelude to an impressive marketing strategy. If a movie was made for teenagers but 40-somethings are the ones loving it, the studio will pivot its entire ad campaign to target the older crowd.
In recent times, Aamir Khan in Bollywood and, sometimes, Kamal Haasan in Kollywood have followed the model.
