"Automatic synchronization" refers to the process of two or more things automatically adjusting or coordinating with each other without any manual intervention. Full definition
The cloud also provides automatic synchronization of newly bought e-books which appears in a cloud in PDF and ePUB formats to be easily uploaded to any device. (goodereader.com)
provides automatic synchronization of an individual or team's Realhound database with just a simple internet connection. (nreionline.com)
This will allow automatic synchronization of content with your Kindle and other devices. (kindlehelp.org)