Emma learned several important things from gathering audience feedback during the production of her horror film trailer and ancillary products:
1) Her audience provided honest feedback about what they wanted to see in terms of genre conventions and were eager to participate in the pre-production process.
2) Incorporating the audience's ideas and opinions helped ensure the final products would appeal to and be supported by the target viewers.
3) Continuous feedback during the editing process allowed for helpful adjustments before the products were finalized.