To copy and paste on an Android device, tap and hold on the text you want to copy until you see selection handles, adjust the selection if needed, then tap "Copy." To paste, tap and hold in the area where you want to insert the text and select "Paste" from the menu that appears.
If you mean from one product to another, are you talking about copying text or photos in one app and then pasting them in another app? If so, I know one big problem is that Google has deleted the ability to paste anything into gmail.
