What is FOH mixing vs. monitor mixing?

FOH (Front of House) mixing is what the audience hears. The FOH engineer sits at a mixing console positioned in the audience area (typically center, about two-thirds of the way back) and controls the overall sound mix being sent to the main speakers. Their job is to make the event sound great for every person in the audience.

Monitor mixing controls what the performers hear on stage. Performers need to hear themselves and other musicians or presenters to stay in sync, but the stage is a different acoustic environment than the audience area. A monitor engineer creates separate mixes for each performer, sent through stage wedge monitors or in-ear monitor systems. Large concerts and theatre productions typically have a dedicated monitor engineer. Smaller corporate events usually don't need one because stage monitoring requirements are simpler.