Industry analysis is used to understand the competitive dynamics of an industry. It examines factors like demand, competition, and future prospects considering technology. Conducting industry analysis allows businesses to retain customers, attract new ones, ensure sustainability, align strategy, attract and retain talent, and create a holistic view of the business environment. Common tools for industry analysis include Porter's 5 Forces, PEST analysis, and SWOT analysis, which examine political, economic, social, and technological factors both internally and externally.