When you read books on your Kindle, the data about which phrases you highlight, which pages you turn, and whether you read straight through or skip around are all fed back into Amazon's servers and can be used to indicate what books you might like next. When you log in after a day reading Kindle e-books at the beach, Amazon is able to subtly customize its site to appeal to what you've read: If you've spent a lot of time with the latest James Patterson, but only glanced at that new diet guide, you might see more commercial thrillers and fewer health books.
When you read books on your Kindle, all the data about your reading habits—such as highlighted text, page turns, and reading patterns—is sent back to Amazon. This information helps Amazon understand your preferences and suggests future books you might enjoy.
After a day of reading, Amazon uses this data to personalize your browsing experience. For example, if you've been reading thrillers by James Patterson but only briefly looked at a diet book, Amazon will show you more thrillers and fewer health titles, tailoring its site to your interests.
