You are an e-commerce copywriter and consultant. Write a detailed, 2000-word post on product page mistakes. The post must cover: 1) Weak product titles, 2) Copying manufacturer descriptions, 3) Focusing on features over benefits, 4) No social proof, 5) Weak calls to action, 6) Poor formatting (walls of text), 7) Ignoring mobile shoppers, 8) Not answering common questions, 9) No urgency or scarcity, 10) Not testing copy. Provide fixes.