A Grapple is initiated with an Unarmed Strike, by choosing to Grapple the target instead of Inflicting Damage or Shoving the target. The target must succeed on a Strength or Dexterity saving throw (it chooses which), or it has the Grappled condition. The DC for the saving throw and any escape attempts equals:
8 + the grappler's Strength modifier + the grappler's Proficiency Bonus.
While Grappled, you experience the following effects:
Speed 0. Your Speed is 0 and can’t change.
Attacks Affected. You have Disadvantage on attack rolls against any target other than the grappler.
Movable. The grappler can drag or carry you when it Moves, but every foot of movement costs it 1 extra foot, unless you are Tiny or two or more sizes smaller than the grappler.
Escape. While Grappled, you can use your action to make a Strength (Athletics) or Dexterity (Acrobatics) check against the grapple’s escape DC, ending the condition on yourself on a success. The condition also ends if the grappler has the Incapacitated condition or if the distance between you and the grappler exceeds the grapple’s range.