Improves Performance and Quality Much like studying before an exam gets students the grade, good QA testing ensures that you put out a top-notch web application. This is the phase where you get a sense of how the application performs, what you can do to improve product usability, and any changes that may be necessary before releasing a version of your application.  Secures the Application Security issues are a top concern for customers and companies alike as the number of threats we have to contend with increases. QA testing can help you identify and manage any potential vulnerabilities in your application before they ever have a chance to wreak havoc.  Reduces Time and Expense Research shows that 75% of a developer’s time is spent on debugging. (That’s 1500 hours a year!) All that time adds up and can cost your organization a lot of money. If you can catch as many bugs as possible early on, you can more easily free up time and resources that would otherwise be spent debugging down the line. Testing reduces errors and the costs associated with resolving them. It can also help you sort out or uncover potential problems with code quality.