The importance of a meta description in the fact that search engines may choose to use it in the SERPs, instead of displaying relevant bits from the page. Speaking from a marketing point of view, this may improve CTR. A meta description may also have a minor effect on search engine rankings, but it is definitely not a critical factor in that regard. Here is an example:
<head>
<meta name="description" value="Nusa Dua is a beautiful place in south of Bali with white sand beaches and beautiful sea view from hill" />
...
</head>
