As the use of mobile devices for internet access has surpassed that of desktop computers, ensuring that websites are mobile-friendly is critical for businesses to attract and retain users. Mobile website testing is essential for checking website responsiveness and compatibility across various devices, enhancing user experience, and improving search engine rankings. Several methods exist for effective mobile testing, such as using tools like LT Browser for responsive testing, iOS and Android emulators, Responsinator for screen resolution checks, and real device testing for accurate results. Additionally, validating HTML and CSS code with open-source tools can ensure functionality across all platforms. Adopting best practices, including setting clear testing priorities and strategies, further enhances the efficiency and success of mobile website testing.