"Clipboard" is an intermediate data storage designed to transfer or copy information between applications or parts of the same application through the operations Cut, Copy, Paste.
Physically, clipboard data is stored in the RAM of the user's device, and only the owner of the device has access to the buffer. It is not possible to remotely receive data from the buffer of your phone or computer. Except if the attacker had physical access to your device.
How the clipboard works
When inserting information from the clipboard, the first format recognized by the application is usually used, which will be the most informative (suitable) for this application.
For example, if a word processor copies text in code format, in the form of a picture and text without formatting to the clipboard, it can be inserted into another word processor with markup preserved, into a graphic editor with a picture and into a simple text editor with unformatted text.
You can paste an object from the clipboard an unlimited number of times. When copying information to the buffer, its previous contents, as a rule, disappear. However, there are clipboard implementations that allow you to store several objects at the same time and select the one you need when inserting.