The outlining function that allows you to see the depth and breadth of the information you plan to cover is called a topic scope.
I at least believe that should be the correct answer. The scope of a topic covers everything that you want to write about when it comes to a certain subject. It deals with any information you want to include in your essay.
IDK is text slang for 'I don't know'
TTYL is text slang for 'talk to you later'
I'm not sure about LY, but I'm guessing its 'love you'
Answer: it stand for British Petroleum