Never heard of this before

1. A specific topic that people commonly say “I’ve never heard of this before” about (e.g., a rare concept, forgotten history, unusual technology, or hidden culture)?
2. A personal-style blog post written in a reflective tone about the experience of encountering something completely new?
3. SEO-style content (informative, list-based, educational) or storytelling/opinion-based content?

Also let me know:

• Target audience (general readers, beginners, professionals?)
• Tone (casual, professional, curious, inspirational)
• Whether 3000 words should be exact or approximately