Research and planning is crucial for creating a successful media product. It involves analyzing existing similar products to understand what appeals to target audiences. When creating a horror film trailer, extensive research must be done on the purpose of trailers, horror trailer conventions, existing horror trailers, cinematography, editing, sound, visual style, the target audience, production companies, budgets, and marketing techniques. Careful planning is then required for the plot, locations, lighting, casting, filming, editing, sound, visuals, marketing, and budgets.