In A Website there are features of every web page that are just as important as style and design.  The crazy thing is that most people never even see these other features.  They are called meta tags.  If you have a business website, you really can't do without them.
First of all, what are meta tags?  They are the descriptors found in the head of your HTML code (on every single page) that attract search engines to your site.  You can substantially increase the traffic that comes to your web site by writing meta tags, and understanding their value. 
There are three different kinds of meta tags: the page TITLE tag, the page DESCRIPTION tag, and the KEYWORD tag.  Some search engines will only look at one or two of these tag types; others will look for all of them; others are not concerned with meta tags at all.  The top search engines, however, usually do look for meta tags so it's better to be safe than sorry:  put them on each page of your site.
Meta tags are used by search engines to index your site. Think of it as an online filing and cataloging system. When search engine spiders crawl the internet, they file sites according to type of content. So if you have a website about cars, your meta tags will reflect that