What is an any % speed run in Diablo 2?

While I haven’t played Diablo 2, I can tell you any% speedruns are speedruns with the goal of finishing the game as fast as possible, while allowing the player to ignore side content. The percent symbol refers to the % of activities completed in the game – in this case it refers to not completing side activities in the speedrun. Other speedrunners attempt to complete all activities available in the game, known as a 100% Speedrun.