Here’s a professional and persuasive description you can use:

🎊 Limited-Time Offer

Kickstart your social media growth with an exclusive welcome reward! New users who sign up and complete their first wallet funding will receive an instant ₦500 bonus credited to their account. Use your bonus to place orders for high-quality social media services and experience fast delivery, affordable pricing, and reliable support. Don’t miss this limited-time opportunity—join Joede Social Boost today and grow your online presence for less!

You can also add a small note at the bottom:

Terms & Conditions: The ₦500 bonus is available only to new users after their first successful wallet funding. This offer is valid for a limited time and may be withdrawn without prior notice.