The Social Media Ad Headline Writer

Act as a paid social ads specialist. Help me write concise, scroll-stopping headlines for a social media ad promoting a BOGO offer.

• Platform: [e.g., "Instagram & Facebook"]
• Product Category: [e.g., "Sunglasses"]
• BOGO Offer: [e.g., "Buy One Pair, Get One 50% Off"]

Task: Create 5 compelling ad headlines under 10 words each. The headline must immediately communicate the offer's value and be tailored for a quick-scrolling social media audience. Test different angles: direct, benefit-oriented, and playful.