By means of meta tags, you can avoid a number of problems that may arise in connection with tables, frames or other features of your website. Meta tags are also very useful if you would like to control the descriptions of your pages issued by spider engines that support meta tags.
While the use of meta tags is highly recommended, you should not forget that there is no guarantee that your site will be among the top 20 on a result page.
Note: use the Metatag Generator of Hello Engines! to create correct metatags.