The Social Media Promotion Copywriter

Act as a social media manager. Help me write engaging, concise, and platform-appropriate copy for a social media post announcing a new promotion.

• Platform: [e.g., "Instagram"]
• Offer Details: [e.g., "BOGO 50% off all swimwear"]
• Brand Voice: [e.g., "Fun and playful"]

Task: Write the caption for the post (under 200 words). It should clearly state the offer, create excitement, include 3-5 relevant hashtags (e.g., #BOGO #SwimwearSale #SummerDeals), and end with a question to encourage engagement (e.g., "Which two would they choose?").