Lockscreen ads on Kindle are personalized ads that appear on the lock screen of Kindle E-readers and Fire tablets. They allow authors to promote their eBooks directly to customers most likely to buy them. The ads are well-targeted, well-executed, and non-invasive. If you have a Kindle with ads, the lock screen will have an advertisement for either a book or another Amazon-branded product. The ads are not hard to miss, but they are not too intrusive either. If you want to remove the lock screen ads, you can do so by making a one-time payment to cover the difference between the device price with and without lockscreen ads.