An author platform is the sum total of an author's online presence, social media following, email list, and any other means by which they can connect with readers. It is important because it is the foundation on which an author can build their brand, connect with their readers, and promote their work.
An author platform is a way for an author to establish themselves as an authority in their field, and to build trust with their readers. It is also a way for authors to promote their work, generate buzz, and connect with potential readers and fans. An author platform can help an author to secure book deals, attract literary agents, and increase their chances of being reviewed by influential bloggers and reviewers.
Having a strong author platform is essential for success in today's publishing landscape, as it allows authors to promote their work to a wider audience and to connect with readers in a meaningful way. It takes time and effort to build a strong author platform, but the rewards are well worth it in terms of increased visibility, credibility, and sales.