What is a common tool for checking website performance?

Google PageSpeed Insights is a common tool for checking website performance because it analyzes the content of a web page and provides suggestions for improving its speed and overall usability. It evaluates various factors such as load time, mobile responsiveness, and server response time, and presents a score along with actionable recommendations for enhancements. This tool is especially valuable for web developers and marketers who aim to optimize their websites to enhance user experience and search engine rankings.

In contrast, Mozilla Firefox is primarily a web browser and, while it might have built-in tools for developers, it is not specifically designed to assess website performance. Microsoft Word is a word processing software, making it irrelevant in the context of website performance analysis. MySQL is a database management system that handles data storage but does not provide insights on website performance.