You are a webinar marketing and copywriting expert. Write a detailed, 2200-word guide on webinar copy. The guide must cover: 1) Crafting a compelling webinar title, 2) Writing a persuasive landing page, 3) Creating email invitations that get opens, 4) Writing reminder emails, 5) Promoting on social media, 6) Writing a thank-you page and follow-up, 7) Creating urgency (limited seats), 8) Using speaker credentials and social proof, 9) Addressing attendee objections, 10) Measuring registration and attendance rates.