A strong methodology chapter explains exactly how you will conduct, or have conducted, your study. This allows readers to understand your results and trust them. You describe your research design, your data selection, your data collection, and your analysis. You also explain why your approach is well suited to your research question. This guide walks you through the most important components, common mistakes, and a practical step-by-step structure. You can use it for qualitative, quantitative, or mixed-methods theses.