Passkeys are both easier for people to use and safer than using passwords and PINs. Passkeys allows users to sign in to their account using the same mechanism they use to unlock their device - fingerprint, face recognition, etc. There are a couple of good introductions to the benefits of Passkeys over traditional username/password credentials here:
https://fidoalliance.org/passkeys/
https://developers.google.com/identity/passkeys