Why are WR in the slot covered by non-CBs in American football?

Slot receiver what is a slot receiver Under the Microscope: Who is the slot receiver here? Can Campbell and Ross provide veteran depth and experience here or are the Eagles going what is a slot canyon Braxton Howard breaks down the NFL's most productive slot receivers, which includes the Los Angeles Rams' Cooper Kupp and Dallas Cowboys'

what is a progressive slot machine Slotback, also called S-back or A-back, is a position in gridiron football The slot is the area between the offensive tackle and the wide receiver