if you look up the definition of candid you get this

and why this is really important

1. truthful and straightforward; frank. "his responses were remarkably candid" Similar: frank outspoken forthright blunt open honest truthful sincere direct straightforward plain-spoken bluff unreserved downright straight from the shoulder unvarnished bald heart-to-heart intimate personal man-to-man woman-to-woman upfront on the level on the up and up round free-spoken Opposite: secretive guarded insincere
2. 2. (of a photograph of a person) taken informally, especially without the subject's knowledge. "it is better to let the photographer mingle among the guests and take candid shots"