This section does two jobs, one before your event and one after it.
Before the event
Add photos of previous editions so potential entrants get a feel for what the event is actually like. These appear on your event page.
This is a simple and often overlooked way to increase entries, because people deciding whether to enter want to see what they are signing up for.
After the event
Return to the same section afterwards to add photos of the event that has just taken place. Race Space then automatically notifies everyone who took part that photos have been uploaded, and gives them a link to view them.