Canon EOS R5 C VR Creator Kit with RF 5.2mm f/2.8 Dual Fisheye Lens - Manual (Page 167)

E-TTL II Flash Metering
Set to [ Eval (FacePrty) ] for flash metering suitable for shots of people.
The continuous shooting speed for high-speed continuous shooting is slower than when
[
Evaluative ] or [ Average ] is selected.
Set to [ Evaluative ] for flash metering that emphasizes firing in continuous shooting.
If [ Average ] is set, the flash exposure will be averaged for the entire metered scene.
Note
Depending on the scene, flash exposure compensation may be necessary.
Caution
Even when [ Eval (FacePrty) ] is set, some subjects and shooting conditions may
prevent you from obtaining the expected result.
167