Testing should start with parts of a website that affect action. This means pages where visitors decide to sign up, buy, or contact a business. Headlines are a step, since they shape first impression and guide reading. Buttons are important because small changes in words or color can affect clicks. Page load speed matters, because slow pages push people away. Start with one test, watch the result, then move to the next area. Clear goals show if a test is working. Which website part do you think usually affects results the most?