Once upon a time Meta Tags were an important part of your search engine optimisation activities. But no longer: very few of the search engine spiders even consider Meta tags when indexing your site.
But you ignore Meta Tags at your peril.
In particular, the Description tag plays an important role in the search engine results page. It is part of the persuasive call to action to searchers, encouraging them to click on your site.
Give your site a fighting chance in the results page, and write a good Description tag.
Note that Google displays the Title Tag in bold blue, and below it are displayed the two black lines containing my Description tag:
You can see your Title and Description tags by using the View | Source option in your web browser.
And finally, remember those two black lines of text in the Google search engine results might come from your DMOZ entry, or from some relevant text extracted from your site.