This document outlines a research methodology for studying the relationship between marketing strategies in the cosmetic industry and consumer behavior. The research objectives are to understand how marketing trends impact consumer behavior and study consumer buying habits of cosmetic products. The research will explore factors influencing cosmetic purchases, current company marketing strategies, and market gaps through analyzing secondary data and case studies. The expected outcomes are understanding consumer behavior patterns regarding cosmetic categories/varieties and how companies regulate purchases and adapt strategies to shifting consumer preferences.