Smashwords is a place to publish, sell, and distribute ebooks. Smashwords provides ebook distribution to many retailers, including Apple’s iBooks and Barnes and Noble.
Smashwords charges no upfront fees. They take a percentage of each ebook you sell. For books you sell through the Smashwords bookstore, you keep 80% of the book’s list price. For books sold outside the Smashwords store, you keep 60% of the book’s list price.
Smashwords provides an easy way to distribute your ebook to many stores.
You can make more money per sale by using Paddle or Gumroad. A $10 ebook would net you at least $1 more using Paddle or Gumroad instead of Smashwords.
You can’t sell books on Amazon using Smashwords.
Smashwords does not print books.
If you want to sell ebooks at many retailers, give Smashwords a try.