Quantitative research uses structured surveys and questionnaires to collect statistical data from large, representative samples to guide business decisions. It seeks factual answers through closed questions. Qualitative research analyzes unstructured data like interviews and open-ended responses to understand people's attitudes, behaviors, and motivations. It does not rely on numbers but seeks to explain the "why". Audience profiling finds details about a target market, like demographics, interests, and habits, to effectively communicate messages to the right people.