Does friction depends on surface roughness

I have been taught at school that surface roughness is one of the factor affecting frictional force. Until just now I read at Physic Hypertextbook where it said friction does not depends on roughness. Basically it does not classify the abrasion and normal force between ledges as friction. (https://physics.info/friction/summary.shtml) Screenshot: https://ibb.co/3SNdpjL

So I went to wikipedia and it listed that roughness is one of the factor. Screenshot: https://ibb.co/fHfkSJL

Now I confused. Is surface roughness a factor affecting friction?