The answer is a summary function. At the start of an article or web page, a summary functions as a small version of the document, giving readers all the key points while hopping over the other information. In some occurrences, this is all a reader needs. In other examples, the straightforward summary helps a reader choose whether to devote the time needed to read the full document. At the last part of an article or web page, a summary functions as a review, recapping readers of the key points they've just read.
