Many search-engine robots (programs that automatically browse the web gathering information for search engines to index) read the contents of the Description
meta tag. Some use the information to index your pages in their databases, and some also display the information on the search results page (instead of displaying the first few lines of your document). Some search engines limit the number of characters they index, so its a good idea to limit your description to a few words (for example,
Enter descriptive text in the text box labeled Description.