Review and optimize my landing page copy for [PRODUCT]. Target visitor: [DESCRIBE — who clicked the ad, what they were searching for, their pain state]. Current conversion rate: [%] (or "unknown"). Evaluate: 1) Above-the-fold clarity — can someone understand what this is and why they should care in 5 seconds, 2) Value proposition clarity vs. competitors, 3) Headline options ranked by conversion potential, 4) Copy structure and flow, 5) Social proof placement and specificity, 6) CTA text and placement, 7) Friction points that kill conversions. Provide rewritten versions of headline, subheadline...