Testers are professionals who evaluate products, software, or systems to ensure they function correctly and meet specified requirements. They identify bugs, issues, or inconsistencies and provide feedback to developers or manufacturers. Their work is crucial in maintaining quality and user satisfaction. In the software industry, testers often use various methods, such as manual testing or automated testing tools, to assess applications. They may specialize in different areas, including functional testing, performance testing, or security testing. By thoroughly examining products, testers help prevent problems before they reach the end user.