Description Metatags | Meta Description
The Meta Description is used as the website description displayed in the search result pages (SERPs) of many search engines & directories.
Description metatags must provide a concise explanation of each web page's content. The meta description in the website development must be written in such a way, using the pages most important "search phrases", that it will entice people to click on the link and visit your page.
Keywords in the description metatags are given some weight with most search engines, Facebook and Google+. The description placed within the Description metatags are often used as part of the descriptive information for your pages when Google shows "extended sitelinks" for your site.
The description metatags are often displayed on search engine results pages, so it can affect click-through rates. The keywords and phrases you use in your meta description tag will not affect your page's ranking in the search engines, but your description tag in your page development my be used in your overall SEO and marketing campaigns. If no description metatags are inserted in the page design, the search engines will often use the first words that appear on the page as the description that appears on search results pages.
The meta description tag allows you to give a more meaningful description in the page development for listings than might be displayed if the search engine was unable to automatically create its own based on the page content. Most engines will index approximately 155 characters (including spaces) in the meta description tag.