You get an online gallery that you can share with family and friends. A link will be delivered to you by email, which you can pass onto family and friends or guests at the event. Everyone with the link will be able to download the images in full high resolution to print as they see fit.
Of course this may be restricted if it is a fund raiser and pictures can be sold by the organisers. This arrangement can be discussed at any time before the event.
The web images are guaranteed to stay up on the web for 12 months, but may be even longer.