02-12-2018 06:48 AM
The clipboard is not an app that you can open. To see what is currently in the clipboard, go to any text field, long press, and tap Paste. The clipboard is very transient, so if you copy anything to the clipboard, it will replace whatever was in it before.
Hope this helps.
02-12-2018 08:54 AM
There are quite a few clipboard manager apps in the Google Play Store. Also, a lot of 3rd-party keyboards offer a clipboard feature.