Unconscious (conditions)

* An unconscious creature is incapacitated, can’t move or speak, and is unaware of its surroundings. * An unconscious creature drops whatever it’s holding and falls prone. * An unconscious creature automatically fails Strength and Dexterity saving throws. * Attack rolls against an unconscious creature are made with advantage. * Any attack that hits an unconscious creature is a critical hit if the attacker is within 5 feet.

Source: 5e Core — official document

* An unconscious creature is incapacitated (see the condition), can’t move or speak, and is unaware of its surroundings * The creature drops whatever it’s holding and falls prone. * The creature automatically fails Strength and Dexterity saving throws. * Attack rolls against the creature have advantage. * Any attack that hits the creature is a critical hit if the attacker is within 5 feet of the creature.

Source: 5e Core — official document

While you have the Unconscious condition, you experience the following effects. * Inert. You have the Incapacitated and Prone conditions, and you drop whatever you’re holding. When this condition ends, you remain Prone. * Speed 0. Your Speed is 0 and can’t increase. * Attacks Affected. Attack rolls against you have Advantage. * Saving Throws Affected. You automatically fail Strength and Dexterity saving throws. * Automatic Critical Hits. Any attack roll that hits you is a Critical Hit if the attacker is within 5 feet of you. Unaware. You’re unaware of your surroundings.

Source: 5e Core — official document