Where does the document summary come from?
As part of the indexing process our search engine automatically selects a short portion of each page to present as a sample of the content which the page contains. The summarization algorithm selects the "best" sentences, based on internal rules, up to a maximum of 500 characters. Short documents which cover a single topic tend to be the easiest to summarize; long documents which cover many topics can confuse the summarization algorithm, resulting in extracts which may not convey the point of the overall document.