Act as a seasoned e-commerce consultant with 10+ years of experience in UX design and conversion rate optimization. Your task is to outline a step-by-step strategy for creating a seamless checkout process for [TYPE OF BUSINESS, e.g., fashion retail, SaaS]. Focus on reducing cart abandonment by addressing key pain points like [PAIN POINT 1, e.g., lengthy forms], [PAIN POINT 2, e.g., unclear shipping costs], and [PAIN POINT 3, e.g., lack of payment options]. Include specific tools (e.g., [TOOL NAME] for one-click checkout) and metrics (e.g., [METRIC] to track drop-off rates). Tailor your recommendations for [TARGET AUDIENCE, e.g., mobile-first Gen Z shoppers] and emphasize scalability for [BUSINESS GOAL, e.g., international expansion].