engages the reader
teaches the reader something useful (a new way of thinking about the essay in question)
helps the reader to see the bigger picture that the summarized essay is a part of, and
helps you as the writer to gain a deeper understanding of the issues and arguments of the essay being summarized.
The use of vague language allows them to say things in a very generic way so that they can account for what they say, any more precise language can become compromising for them as they will be asked in the future to account for what they said, so a sentence like "we will do our best to erradicate corruption" is vague and if a politician is asked to account for this they can say "well, we have been doing our best but it is not easy", now if they say "we will erradicate corruption in our government within the next three years." people can ask them to account for these exact words.
Answer:
there's no question and no picture so what do I go off of ?
