Primary research involves collecting data directly through methods like questionnaires and surveys. It provides personally collected information directly related to the study, but may be unreliable or outdated. Secondary research uses existing research sources like the internet or libraries, allowing time and cost efficiency while accessing extensive existing data, but requires crediting other works and may not always be easy to find. Audience research examines who uses a product by interviewing or surveying specific audiences, obtaining truthful answers while reaching a diverse audience, but interviews can be steered to certain advantages.