PageSpeed refers to the measurement of how quickly a web page loads and becomes interactive for users. It is an important factor in user experience, as faster-loading pages can lead to higher engagement and lower bounce rates. Tools like Google PageSpeed Insights help website owners analyze their page speed and provide suggestions for improvement. Improving PageSpeed can involve optimizing images, reducing server response times, and minimizing the use of heavy scripts. A faster website not only enhances user satisfaction but can also positively impact search engine rankings, making it a crucial aspect of web development and digital marketing.