Restrained

Restrained • A restrained creature’s speed becomes 0, and it can’t benefit from any bonus to its speed. • Attack rolls against the creature have advantage, and the creature’s attack rolls have disadvantage. • The creature has disadvantage on Dexterity saving throws. — Basic Rules
  The Restrained condition is like the successful older sibling of the Grappled condition. The main distinction between the two is that a grappled creature is being latched onto by something, whereas a restrained creature is being completely, well, restrained by something. While both conditions drop the affected creature’s speed to 0, that is where the benefits of the Grappled condition end while the Restrained condition offers more benefits. Granting advantage on attacks against the restrained creature, while all of the attacks the restrained creature makes are at disadvantage, is a massive debuff that can swing an encounter in the unrestrained creature’s favor. Methods Some examples of things that can apply the Restrained condition are: • Grappler Feat (special melee attack) • Evard’s Black Tentacles (spell) • Maximilian’s Earthen Grasp (spell) • Giant Toad’s Bite (monster ability) Swallow (monster ability)