Concreteness is an aspect of communication that means being specific, definite, and vivid rather than vague and general.
A concrete communication uses specific facts and figures.
often prod their interviewees to speak with greater concreteness.
For instance, if a witness says he gave his wife "a bit of a slap," the cross-examining lawyer might ask how hard he hit her.
A job interviewer will often ask probing questions to elicit more concrete information; e.g., "Could you give me an example of when you did XXX?