To check what iOS version your device (iPad, iPhone or iPod) is on, please go to Settings > General > About:
Here you will see the Software Version number, for example, on the screenshot below we have iOS 12.3.1 installed on the iPad:
If you have an old version that needs to be updated, please follow instructions described in How to update iOS on iPad? To learn about the importance of updating iOS, please click HERE.
We hope you found this information useful!