Source credibility in communication enables:

•  The source credibility theory is a well-established theory that explains how the perceived credibility of the communication's source influences its persuasiveness. 
• It has been discovered that the perceived reliability of the source of any message has a significant impact on its credibility. 
• The objective and subjective components of a source's or message's believability are characterised as credibility. 
•  a speaker's dependability must be constructed and established during a speech and what the speaker did or said prior to the speech was unimportant.
• Source credibility is a phrase usually used to imply a communicator's positive traits that affect the receiver's acceptance of a message,

​Therefore, Source credibility in communication enables message acceptance.

Additional Information

• Gatekeeping: The process of filtering messages before the delivery of information. 
• The conditional frame of references: a structure of concepts, values, customs, views, etc., by means of which an individual or group perceives or evaluates data, communicates ideas, and regulates behavior.