For example, maybe you took an online survey to learn more about how to take care of your car. If you got an email from the auto company that hosted the survey on their website about how they could help you take care of your car, it'd be far less intrusive and irrelevant than if they'd just called you out of the blue with no knowledge of whether you even care about car maintenance, right?
If links and looks are set, begin interacting with the page. Abandon it, adjust the window size, convert. Are error messages appearing when they’re supposed to (if, for example, you don’t input all the form’s required info)? Is your CTA button working? If you abandon the page, are you retargeted with ads? When you resize the window, does your landing page respond accordingly?