Android is the most popular operating system for Android devices and access to it can greatly increase the amount of content, both free and paid, that is available for a tablet. There are different varieties of Android, though, and not just the main “flavours”; some companies customise their Android versions to one degree or another.
The Tagital T10K is an Android tablet, running 6.0 Marshmallow rather than anything customised. It also has access to Google Play and the main Android content network.