Source Credibility

source credibility
in personal selling, the believability of the salesperson
source objection ...

Source credibility: the trustworthiness, likeability, respect or expertise of the perceived source of a marketing message in the minds of the target audience.

expertise - An aspect of source credibility where a communicator is perceived as being knowledgeable in a given area or for a particular topic.
exposure - The perception of an advertisement or a commercial by an individual.

Zhu, J.J.H., and He, Z. (2002), 'Information accessibility, user sophistication, and source credibility: the impact of the Internet on value orientations in mainland China,' The journal of computer-Mediated Communication, Vol. 7 (2).

See also: Consumer, Tactics, Offer, Appeal, Account