Instagram Captions: How to Use Them to Promote Your Brand (with examples) Identify Your Brand Voice. Tailor the Caption to the Audience Persona. Write a Kickass Sentence #1. Engage in Storytelling. Focus on the What is in it for me (WIIFM) Don't Forget to Include a Strong CTA. Count on Caption-Generating Tools. Caption lenght. 15 Jul 2021