In this episode of From A to B, Shiva and Els "Bells" Aerts explore the balance between conducting research and running A/B tests in optimization efforts. Not everything SHOULD be tested, and in fact, research can play a critical role in companies trying to improve on their site optimization when testing isn't available, due to cost, or traffic volume. Finally, they discuss in this weeks "Shit You Need to Know" section... usability testing with older adults, emphasizing the importance of accessibility and consideration for various user demographics in optimization strategies.