Android is an operating system for smartphones and tablets. Depending on the age and manufacturer of your device, you may or may not have the most recent version. Below are some tips to help you understand the differences.
The most recent version of Android is 8.0 "Oreo", which was released in August 2017. To learn more, visit Android History at the official Android website.
The steps for checking your version vary depending on your device (sometimes depending on your version, believe it or not!). Below are general instructions that should work for most Android devices.
The most recent compatible version will be sent to your device automatically whenever there's an update or new release. All you have to do is accept, and your device will take care of the rest. If you have an older phone or tablet, you may not be able to upgrade to the latest version.
Sometimes the differences are purely cosmetic; sometimes they can affect your device in more important ways. Below are just a few examples of things that might be different from version to version: