For 14 years now, Hell in a Cell has been one of the big stipulation matches in WWE. Take a giant cage that encompasses the entire ringside area, put a roof on it and put two (or more) wrestlers in it for a fight to the finish.
The first Hell in a Cell match, Shawn Michaels vs. The Undertaker at In Your House: Badd Blood in 1997, was an instant classic. One of the best cage matches in WWE history, it features amazing performances from both men, with both playing their roles perfectly: Michaels is terrified by The Undertaker, who stalks him around the cage and picks him apart.
Hell in a Cell matches have changed over time depending on the nature of WWE when they take place. At one point they got very big bump/"stunt show"-heavy, then they became bloodbath old-school cage matches when WWE cut down on big bumps.
When WWE banned blood as part of going TV-PG, stunts were worked back in. Nowadays, they're somewhere in between style-wise, just without blood.
Unfortunately, with an annual Hell in a Cell pay-per-view event now on the calendar, the matches just...happen as opposed to being the culminations of major feuds. Still, they can be great, thrilling matches.
Like any wrestling staple, there's a bunch of interesting trivia about Hell in a Cell, and I racked my brain to think of five of those factoids that you may not know about.