Audience research is important because it gives an understanding of the types of audiences and how the audience think, this is good for producers as they can target certain audiences to make the film successful as they can send across the right message to attract an audience. If the producers didn't have the information from the research then they wouldn't understand the audience and may not be able to appeal to the audience to make them watch their film, which means the film wouldn't be successful. So Audience research is very important as it can be the difference on whether your film is successful or not.
Audiences are categorised so that the producers can target certain audiences, for example, children are most likely to watch animated films so the producers advertise animated films for children, this is categorising the audience. This is how audiences are categorised and producers do this because it allows them to target certain age groups such as mature adults, children etc in order to make their production a success.