A grappled creature’s speed becomes 0, and it can’t benefit from any bonus to its speed.
The condition ends if the grappler is incapacitated (see the condition).
If an effect would remove the grappled creature from the reach of the grappler or grappling effect, it must roll vs the Strength defence of the grappler to end the grapple.
Attacks targeting a grappling or grappled creature are at disadvantage, unless a light or natural weapon is used.
A grappled creature has disadvantage to hit creatures that are not grappling it.
You can spend one of your attacks to make an unarmed attack roll vs the strength or dexterity defence (target’s choice) of a creature that you are grappling. If you succeed, the creature is restrained by you. If you fail, the grapple is broken and the creature makes an opportunity attack against you.