Defending high ground:

Defending high ground is the act of protecting your base or another elevated area on the Dota 2 map from an enemy push. It usually refers to fighting from uphill positions near Tier 3 towers, barracks, or the Ancient, where the defending team can use vision, choke points, and tower protection to make an assault harder.

It matters because high ground defenses often determine whether a team can stall for time, recover map control, or stop an enemy from ending the game. Teams commonly defend by grouping, clearing waves safely, and forcing the attackers into unfavorable fights.

Related: High ground, Barracks, Ancient