Tongue twisters are a sequence of alliterative words or sounds that are challenging to say quickly. It is made to be a challenge to say, and it is popularly used as a sort of game where you try to say them correctly and rapidly five times. 

Another use of tongue twisters is to improve pronunciation. People use them as exercises to improve their articulation, pronunciation, and accents. You will find that practicing with a tongue twister several times a day can help you speak more clearly.

The structure of a tongue twister is usually alliterative, and some may not even make any sense. Each phrase has words with different syllables, but they sound alike, so it becomes difficult for your tongue to properly form the words. When using tongue twisters to practice your speech, focus more on saying them correctly instead of faster.