Mark Schaefer speaking at SMMW in 2016
Mark Schaefer will be the closing keynote speaker at Social Media Marketing World 2019, marking the first time a speaker has been asked twice to be a main stage keynote speaker.
Schaefer also closed SMMW in 2016 and was the highest-rated speaker of the event, which featured nearly 200 different sessions.
SMMW, based in San Diego, is among the largest marketing conferences in the world and is expected to have more than 7,000 participants attending both live and through an online access ticket.
