Context should never be thought of as ‘additional information’. An examiner never wants to see what they call “bolt-on” context: random historical information that has little or nothing to do with the theme or focus of your exam question.
That means you should never include, for example, biographical information about Shakespeare, or factual information about the year 1606. Instead, all context needs to be integrated into the main ideas in your essay. At best, context gives a fascinating additional perspective to the themes Shakespeare is exploring.