by Derek Haines on Just Publishing Advice site:
Book metadata is in the end, what really sells ebooks, so you need to know about it.
If you are an author and self-publishing on Amazon, Kindle, Smashwords, Draft2Digital, Apple, B&N or anywhere else, you need to know what book metadata is, and how to use it to help sell more books.
Take it from me, as an author who has been chronically lazy and left many of my long list of previously published books unchanged from the day they were published; times have changed. And how!
I have been booted into action, however, by this book metadata stuff because, well, um, here comes my admission. Because my book sales were falling, and I know why.
I have not made it easy for readers to find my books. No matter how many great reviews my books may have, if readers can’t search and find my titles on retail sites, how can I hope to sell more books?
The word metadata may sound technical, but in reality, it is very simple, as it is only about words and phrases that will help readers find your books.
For the sake of simplicity, I’ll use the example of what metadata can be added to an ebook on Kindle Direct Publishing, but it will work almost exactly the same for all other publishing platforms.