It really depends on what you are copying and why you are doing it. Copy/paste is there to save you having to retype something that you already have.
For example, If it is the address of a website that you want to go to then you would paste it into the address bar of your browser.
If I wanted to copy/paste your question then I could put it here in this reply, like this:
I have found out how to cut / copy and paste,but I don't know where you are meant to put the information when you have done that.
Sometimes it says that you are meant to cut / copy and paste to your browser....but where do you put it.
If anybody can help,I would be deeply grateful.
Regards......Mike