Are meta tags critical? Every search engines emphasizes meta tags differently. Google doesn't let the public know how it uses meta tags. I have noticed that a lot of websites show up on the first page of Google for specific subjects and yet they don't have any keyword or description tags. So don't let anybody fool you by exaggerating how important they are for Search Engine Optimization. Search engines index algorithms vary greatly -- some assign a lot of importance to meta tags, so it is a good idea to use them.
Meta tags are lines of code that are hidden in web pages. The code information is not revealed in the web browser (but refer to the discussion of the description tag, below) but they are utilized by search engines to help categorize your web content. It is possible that you might choose to omit descriptions, or keywords, but your site won't look right if you don't put a "title" tag, since the web browsers will show it as "Untitled".
In order to obtain traffic (by cheating) a long time ago, people would place repetitive or irrelevant information into their meta tags -- "stuffing" them. As a penalty, several search engines don't put too much importance on keywords in meta tags, but they still look at them to be certain they have meaning. Whichever the case, your rank will probably suffer on other search engines if you lack meta tags, or have useless keywords.
The "head" section of a web page is where meta tags are found. Some people suggest using only lowercase letters in your tags, and avoid repeating terms within the keyword tag.
Generally speaking, the actual meta tag contents appear invisible; however the "description" meta tag's contents will turn up in the majority of search engines together with the page title in the search results. Do not overdo your meta description; you can place keywords in the description tag, but try to keep language natural, in complete sentences, and keep it short and relevant.
