Why is Shakespeare so great in English literature?

Many writers learned a lot from Shakespeare's works. He is a milestone in the history of literature.

Because he is Shakespeare and people love his plays desperately.

Sometimes, something somehow happenning to somebody somewhere for some reason. And you'll have to live with that!

many people learn english just to understand his book.

because he wrote a lot of plays and in olden days people don't care about english literature. Shakespeare used a lot of slang in his play and it is used nowadays.