Qualitative data analysis involves three main steps: 1) developing and applying codes to categorize themes and ideas in the data, 2) identifying patterns and relationships between codes, and 3) summarizing the findings. There are three types of coding - open, axial, and selective - which are used to organize the raw data and link the emerging categories. While there are no universally applicable techniques, common methods for interpreting qualitative data include identifying frequently used words and phrases, comparing primary and secondary sources, and searching for missing information. The last stage involves linking the findings back to the original hypotheses or objectives.