At what point in the whole story your evidence originates from (bonus points for act and scene numbers). Less difficult than it sounds. Basically, you’re setting the scene for the quote, or painting a picture within which your quote is said. Make an effort to include who it was said by, who it absolutely was said to, and where it was said (less important if said during a event that is significant the text, that you should mention instead). The explanation for contextualisation is the tendency that is unfortunate people to make up quotes on the spot. Such as the scene for which you found your evidence invites the marker to check on you on the honesty. It can also help enormously in ‘giving a feel’ towards the vibe that is general of quote, so the marker can see you’re deploying it appropriately and not twisting it to mean the alternative of what the author intended it to be (or at least, didn’t intend it not to ever be).