KINDLE DIRECT PUBLISHING (KDP) is an online platform by Amazon that allows people to Publish little paged Word documents of their Fiction and non-fiction eBooks to the entire Amazon reader audience, worldwide and earn royalties(money) each time someone buys or reads it.

Amazon has over 200 million members worldwide, and you don't need to advertise like other online business models before you reach the Majority of these audiences. There are some high-end secrets that you'd be taught to make Amazon advertise your books themselves for Free.