Flickr is an online photo and video storage site that is an ideal place to store photos and videos taken at your events.
It is a good idea to keep updating this site with new material as it can draw potential visitors to your main sites where they can find further interesting information about your brand.
Sites like Flickr allow you to give your business a personality, people are able to see photos of you, your team, your business, services and products. Photos provide a window into who you are and what you do. People relate to images. Use them.