Hidden Text
A web page Content or part there of, that is purposefully formatted so that it users are unable to see that content but it can be read by Search Engine crawlers. The intention is to include some content to increase Keyword density in that page. This technique usually is referred as Black Hat SEO technique. In modern times, most of the search engines can detect hidden text and when detected search engines may penalize site temporarly or permanent inclusion in their search engine result pages. During your search engine optimization process make sure there is no hidden text in your website pages.
