The document discusses four research methods: primary, secondary, quantitative, and qualitative.
Primary data is obtained directly from sources like surveys and questionnaires. Secondary data uses existing research from sources like books and articles.
Quantitative data can be analyzed statistically and handles large data sets, while qualitative data uses small samples obtained through interviews and focus groups to understand people's specific interests.
Each method has advantages like direct data collection for primary or reusing existing data for secondary, but also disadvantages like time needed to analyze responses for quantitative or qualitative.