More rows per page leads to larger pages and longer loading times. A maximum of 100 result rows can be returned at once. You can click on any title to go directly to that document. A short description of the document in which the search string was found. This can help determine if the information you are looking for is recent enough in that particular document.
Larger pages take more time to download.
Higher scores are given for several factors, such as location of the search string in the document and frequency of the search string in the document.