The first site I reviewed was the Nielsen Norman Group website:
https://www.nngroup.com/articles/usability-testing-101/
The second site I reviewed was BrowserStack:
https://trymata.com/blog/what-is-user-testing/
User testing is a process where real people use a website to see how easy it is to navigate and understand. Instead of guessing what users might do, developers watch how users actually interact with the site. This helps find problems like confusing layouts, broken links, or features that are hard to use.
During user testing, participants are given tasks to complete on a website, such as finding information or completing a form. While they do this, developers observe how they move through the site. They look for things like where users get stuck, what confuses them, and how long tasks take. Sometimes users are also asked questions about their experience.
Websites need to work across different browsers like Chrome, Safari, and Firefox. Developers test their sites on multiple browsers and devices to make sure everything looks and works the same. Tools like BrowserStack allow developers to simulate different browsers and devices without needing to own all of them. This helps ensure that users have a consistent experience no matter what they are using.