A passphrase is a string of words and symbols that form a phrase. Passphrases function as passwords but are much less easier to hack than a typical password.
An example of a passphrase might be: What is a Seawolf?
(tip: don't use this, it is just an example. Come up with your own passphrases!)
This passphrase contains uppercase characters, lowercase characters, and symbols (spaces are considered symbols).