An author platform is the collection of places and relationships through which readers can discover your work. It does not need to begin with a large following. A clear, consistent presence is more useful than trying to be everywhere at once.
Start with a simple author identity. Make it easy for people to understand what you write and where they can find updates. An author website or profile can bring together your biography, books, newsletter and contact information.
Choose platforms that suit your audience and your habits. If you enjoy visual storytelling, image-led platforms may feel natural. If you prefer longer conversations, a newsletter, blog or community space may be a better fit.
Share more than announcements. Talk about your interests, reading life, creative process and the themes that shape your work. Give readers a reason to follow before a book is available.
Most importantly, choose a routine you can maintain. An author platform should support your writing, not consume all the time you need to write.