It's important to have an informed distribution plan when you are getting ready to publish your book. How you publish your book, whether traditionally or independently, can impact your distribution options. CamCat Publishing founder Sue Arroyo recommends that indie authors consider online platforms like IngramSpark to publish and distribute their books since Ingram's catalog is accessible to all of the major and independent bookstores. This makes it really easy for booksellers and decision makers to find and order your book. If you're looking for international distribution options, Arroyo recommends a platform like Lulu.
Indie is short for independent. It means as an author you are publishing without using a traditional publisher which means you control the content of the book, timing for when the book is launched and yuu retain all the rights. Let me know if that answers your question sufficiently
What does indie mean?