Software testing is a significant part of assuring software quality, which provides confidence that the product is functioning as intended before installation. It can be done manually or automatically, requiring either human effort or the use of automation tools and frameworks, respectively.
Broken software is more than just an annoyance for users. It is all about losing money. Of course, no software is completely bug-free. But for the best experience possible, bugs should be identified before they reach customers. This is where automated testing comes in handy.