What does 'CHARLES III • D • G • REX • F • D • 5 POUNDS • 2022' on new UK coin mean?

A commemorative 5 pound coin featuring the portrait of King Charles has been unveiled by UK's Royal Mint. The inscription on the coin reads "CHARLES III • D • G • REX • F • D • 5 POUNDS • 2022". The inscription shortened from Latin translates to "King Charles III, by the Grace of God, Defender of the Faith".