What’s the best call-to-action for opt-in forms in affiliate email marketing?

[Daniel]

The best call-to-action (CTA) for opt-in forms is one that clearly tells people what they’re getting and makes it sound valuable. Instead of saying “Submit” or “Join,” use something more specific like “Get My Free Guide Now,” “Send Me The Discount,” or “Show Me How To Start.” The CTA should match the offer and feel personal. If you're promoting affiliate products, your CTA should connect directly to the benefit of the product. A clear and short headline above the CTA also helps, especially when it highlights a result or solution. People need to know what they’re clicking for and what they’ll get in return. Also, using buttons with color that stands out can draw more attention. Testing different CTAs over time will show which one works best for your audience. What kind of call-to-action do you think encourages more people to join an email list?