The article emphasizes the importance of thorough UI testing in software projects, highlighting that it is often undervalued compared to backend functions. It explains that UI testing involves assessing the user interface to ensure usability and functionality, covering both graphical user interfaces (GUI) and command-line interfaces (CLI). The piece discusses the differences between manual and automated UI testing, noting that automation is preferable for repeatable tests, while manual testing is necessary for subjective assessments. It outlines how UI testing contributes to user satisfaction and the product's perceived value, and provides best practices such as ensuring consistency, responsiveness, readability, and functionality of interactive elements. The article also addresses common challenges in UI testing, such as adapting to frequently changing interfaces and the costs associated with writing and executing tests, suggesting that tools like testRigor can mitigate these issues by speeding up the testing process through automation and parallelization.