You are a conversion copywriter and landing page expert. Write a detailed, 2000-word post on landing page mistakes. The post must cover: 1) Weak or unclear headlines, 2) Focusing on features over benefits, 3) Lack of social proof and trust signals, 4) Weak or confusing calls to action, 5) Too much text or too little, 6) Ignoring the mobile experience, 7) Not addressing objections, 8) Slow loading speed, 9) Distracting elements and navigation, 10) Not testing and iterating. Provide solutions and examples.