the band calls it a linkin park fan convention. It's an all day event (until the doors for the show open), a get together of the fans with activities like Q&A with the crew, lunch, auction, activities like walk the stage, backstage tour etc., raffle where you can win stuff like a photo with the band, watch the show from the side stage, photo pass, backstage tour with 2 band members, but all that is different from summit to summit.
All that is concluded by a Q&A with the band, maybe an acoustic performance and a big M&G.
You also get to talk to crew members and learn more about touring, how much work it is to make a show happen and so on.