The titles and descriptions seen above the URLs on search engine results pages are taken by the search engines from the Meta data of the pages at first until other options are planted in directories during an SEO campaign. If a site has no meta description and no SEO content out there on the Web, the search engine selects some relevant snippets of content from somewhere on the site. The answer to the query may be there; if not the searcher will have to access the site and look for the information.