For me the term 'candid' also covers what others might call street photography or documentary photography. I've accumulated a collection of this type of image over the years, some here maybe as much as 10 years old.
If possible I like to engage with people and shoot from a low angle without obviously pointing the camera at them - just keep talking and pressing the shutter! Sometimes I'll ask if they would like a coffee or sandwich either as an icebreaker or a thank you, and of course thank them very much for allowing me to take my photos.
From Wikipedia:- Henri Cartier-Bresson (August 22, 1908 – August 3, 2004) was a French photographer considered to be the father of modern photojournalism. He was an early adopter of 35 mm format, and the master of candid photography. He helped develop the "street photography" or "real life reportage" style that has influenced generations of photographers who followed.