Role of Description tag in SEO

While the Title tag is actually your site's title in the SERPs, the Description (another HTML meta element that can be updated in the site's code but not appear on the page) is actually additional advertising for the site.

Google takes some liberties with what to display in a snippet, so your meta description may not always appear. Instead, Google's crawler can rip out the piece of content that it thinks best matches the description of the page.

But if you can write a compelling page description that convinces people to click on the link, you can significantly increase traffic to your site. (Remember: appearing in search results is only the first step! You still need search engines to come to your site.)