What are the biggest mistakes in conversion-focused website design?

The biggest mistakes in conversion-focused design are treating every page as a conversion page without differentiating by user intent stage, and optimizing for micro-conversions (clicks, scroll depth) while neglecting macro-conversions (actual leads or sales). Both misalign design effort with business outcomes.

Other significant failures include not testing design changes with real traffic before declaring them improvements, designing CTAs that are action-oriented in copy but passive in visual weight, and ignoring the persuasion hierarchy on high-intent pages: the order in which you present value, proof, and ask matters as much as the presence of those elements. Conversion-focused design without an A/B testing cadence is incomplete; it produces hypotheses, not results.