Just like a factory that requires a well-oiled machine, the success of any online venture hinges on the meticulous quality assurance process. Similarly, if a website doesn't perform seamlessly, it won't convert as desired. It's not limited to websites, landing pages, experimental treatments, email campaigns—every facet of the digital landscape must be scrutinized to ensure it performs flawlessly. Yet, despite its undeniable importance, many optimizers fall short regarding comprehensive quality assurance in website testing. The consequences are all too evident in the myriad of online entities that simply miss the mark in terms of functionality. It's high time we recognize the pivotal role of robust quality assurance in achieving digital excellence.