Yes, as long as you use multiple words. The length of your passphrase is the most important factor for its security. Adding numbers or special characters further increases the strength.
Our generator picks words randomly from a curated list of common English words. The randomness and the number of words are what make the generated passphrases secure.
No. You should never reuse passwords on multiple sites. If one site is compromised, all your accounts with that password will be at risk. We recommend using a password manager to keep track of your unique passwords.