The process when additional data is written (
burnt) out to optical disc, so they can played everywhere, however, you cannot edit any data inside the disc, let alone erasing the whole disc (CD±RW,
DVD±RW,
DVD±RAM, and BDRE are the exceptions, because
DVD±RAM cannot be finalized, while RW-disc and BDRE can be erased, though you cannot edit the data after you finalize it---so you need to erase the whole disc and repeat the burning process if there'
s any mistakes)
This process also known as "Closing"