The most important component for Search Engines is providing useful, up-to date, original website content. Search engines pay attention to how many pages you submit and how many times your pages have been updated or changed. They also pay attention to how relevant your text is. Google for example has a program that searches the web and finds how many websites use the exact or close to the same information. This helps them find which sites have duplicate information and are irrelevant to Web Searchers. Google also notices when you stop updating content. So while adding new content helps, not adding content for an extended period of time will hurt your rankings as well.
