Mounts are a feature of Heroes of the Storm. They are used by heroes for extra speed. Heroes cannot attack or cast abilities while mounted.
Heroes are able to ride into battle on a mount, allowing quick returns to a fight and great mobility from one lane to another. Mounts replace boots. They have a two second channel time and allow heroes to move around faster. While mounted, when a hero is hit by any source of damage, they are dismounted and stunned for several seconds. Thus, it is recommended that heroes dismount before reaching combat.
Most mounts include different skins. All players start with a free horse mount, and most additional mounts can be "crafted" via the Collection interface using shards. Prices range from 100 to 1600. In addition, unique mounts are also given as a reward to players who make a real money purchase; these "billy goats" are different depending on when a player made the purchase.
Some heroes don't have a mount, either due to physiology (e.g. Zagara) or abilities that have similar benefits (e.g. Brightwing's teleportation ability).