It's not all about confetti and balloons. Every four years, each political party meets and chooses a platform and a president -- or at least a nominee.
Most Americans see them in short bursts on TV, especially on the last night, when the nominees give their big speeches. But a lot happens before that -- and only some of it shows up on prime-time.
Delegates get the behind-the-scenes work done: about 2,500 at the Republican National Convention and about 4,700 at the Democratic convention. They help with the party platform -- basically a document that says what the party believes, like a $15 minimum wage or renegotiating trade policies. A committee writes it up, then the delegates vote to approve or amend.
Video includes images from Getty Images. Music provided courtesy of APM Music.