It would be better to leave this thread open to give other members the chance to add some information or correct some misconceptions such as this one:~
Look like the one who actually understood it, is the OP instead of some post above.
Literally, all those incorrect information are already being addressed on the link I have referenced.
Private keys
While a Secret Recovery Phrase is used to back up your entire MetaMask Wallet, including all accounts created in that wallet, each account has its own private key.
~12 words in a seed phrase. Some ~ use 24-word phrases. Each one of these words corresponds to a series of numbers, and when placed in a specific order, represent a much more user-friendly way to remember a very, very long number.
@Ludmilla_rose1995 @stomachgrowls, I recommend try to comprehend the basic information that is being referenced. Even if you mean to (wrongly)simplify, it wouldn't do too much help to the newcomer. There is a reason why Metamask also addressing about the subjects.