What are the common mistakes in conversion optimization marketing?

Relying on gut instinct instead of data is a major mistake. So is running one-off tests without a clear goal or process. Many teams test trivial elements, like button colors, while ignoring bigger friction points like poor messaging or confusing navigation. Another common error is not giving tests enough time or traffic to yield valid results. Without statistical significance, you risk making decisions based on noise. Finally, many don’t track long-term impact. A win today might underperform over time if it doesn’t match user expectations.