Which subject line work best for you ?

The subject lines that work best are often the ones that spark curiosity while being clear about the value offered. Here are a few examples that perform well for us: "You’re missing out on [Feature/Benefit]—See why" – Creates urgency and FOMO (Fear of Missing Out). "3 Tips for [Audience’s Specific Need] You Can Use Today" – Practical, specific, and actionable. "How [Well-Known Brand/Person] Achieved [Desirable Outcome] with [Product]" – Social proof combined with a success story.

Anything that's authentic, personal and is about the reader. "Need your direction to improve Speech to Note for you" "What can we do better for you?" "Abhishek here with Festive Greetings. How about a crazy offer?"

Do you mean in newsletter? People usually open when I offer / reveal something that helps them to grow faster.

Subject lines that pique interest without being overly promotional appeal to me. When an email promises to fix an issue I'm having right now, I enjoy it.