At that time, theatre, or drama, was person-based and some scenes were based on monologues or speeches of certain characters which have become very famous ("to be or not to be, that is the question" from Hamlet), another anecdote is that there were no women on stage; the clothes, tapestries and curtains were splendid and there were machines to move up or down things. We can see this is The Globe, the theatre were he played most of his plays.
Why is Shakespeare so important?
For me, he is so important because he was an expert in creating plays that treated many different topics (love, war, betrayal, foolishness ... and many more) and he did so in a way that he achieved to address to the inner emotions of people and they are as up-to-date now as they were when he created them.
He also wrote a lot of poetry (great sonnets), and invented many words of the English language.
Have you read anything by Shakespeare or attended to any of his plays? Do you know the names of his most famous plays?