Your question is Determining A/B Test Significance. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
You're evaluating a marketing experiment on a digital campaign and need to decide whether the observed lift is real or just noise. You are asked to explain how you would assess the result and communicate whether the experiment was statistically significant.
How do you determine the statistical significance of a marketing experiment?