Share 'How does an agency help clients run their social media campaign?'

Hi all, I am fine tuning my social media marketing processes and would like some inputs in these areas: - Does the agency provide the voice on behalf of the client or they just create the environment for the client to do it themselves? - Typically, how does an agency run a social media marketing campaign for their clients? What are the steps to take note of? What is involved? Thanks in advance…