"Apply the AIDA copywriting formula to create a 700-word sales letter that convinces readers to sign up for a new online course on [topic]. Use urgency by emphasizing a limited-time discount offer that expires in [number of days], and incorporate social proof by sharing a success story from a student who went from [problem] to [solution] after taking the course. Additionally, highlight the unique features and benefits of the course that make it stand out from other similar offerings in the market."
