Prone (conditions)

*A prone creature’s only movement option is to crawl (every 1 foot of movement while crawling costs 1 extra foot) until it stands up. * Standing up requires half a creature’s movement. * A prone creature makes melee attack rolls with disadvantage. * An attack roll against a prone creature is made with advantage if the attacker is within 5 feet. Otherwise, the attack roll is made with disadvantage.

Source: 5e Core — official document

* A prone creature’s only movement option is to crawl, unless it stands up and thereby ends the condition. * The creature has disadvantage on attack rolls. * An attack roll against the creature has advantage if the attacker is within 5 feet of the creature. Otherwise, the attack roll has disadvantage.

Source: 5e Core — official document

While you have the Prone condition, you experience the following effects. * Restricted Movement. Your only movement options are to crawl or to spend an amount of move- ment equal to half your Speed (round down) to right yourself and thereby end the condition. If your Speed is 0, you can’t right yourself. * Attacks Affected. You have Disadvantage on attack rolls. An attack roll against you has Advantage if the attacker is within 5 feet of you. Otherwise, that attack roll has Disadvantage.

Source: 5e Core — official document