What is swimming speed 5e?

Swimming speed 5e is a rule found in the Dungeons and Dragons 5th edition Player's Handbook. It refers to the speed at which a creature can swim in water, measured in feet per round (or approximately every six seconds).

If a creature has a swimming speed listed in its stat block, that means it can move that distance (up to its speed) while swimming through water. This can be particularly useful in underwater combat or when trying to cross large bodies of water quickly.

Note that not all creatures have a swimming speed; some may have a different means of moving through water (such as walking on the bottom or using magical means). Additionally, a character's armor and equipment may affect their swimming speed.

Overall, swimming speed is an important aspect of the game when dealing with aquatic environments and creatures, and can add an interesting element to combat and exploration.