Dota is the MOBA that kick-started the genre. It started life as a Warcraft 3 mod all the way back in 2003; none could have predicted the kind of legacy it would help create, with one of the strongest esports scenes in gaming, with Dota 2 going from strength to strength.
With all the Dota 2 heroes, it can be tricky to figure out which are best, especially in their respective roles, with midlaner historically being the most popular of these roles. This has changed in recent years, although many still play in the isolated midlane to be the tempo setter of a match.