Briefly tell about Shakespeare's marriage.
It is good that you would like the description of Shakespeare's marriage to be brief, since very little is known about Shakespeare's life, his marriage included.
He was married to Anne Hathaway at the age of 18 when she was already pregnant. This might suggest that he "had" to marry, though the reason that he married at such a young age is not known. In Shakespeare's day, women often married very young, but men often waited until their work life and income was more settled.
William and Anne had three children, one of whom, Hamnet, died (of what, we do not know) at age 11, and there is questioning about what role his death may have played in Shakespeare's creation of the character Hamlet.
Shakespeare actually lived most of his life away from his family in London -- writing, producing and acting in his plays. When he died, he famously left his "second best bed" to his wife, a wife that we know very little about.