It’s showing up in the source here:
<!-- This site is optimized with the Yoast WordPress SEO plugin v1.4.7 - http://yoast.com/wordpress/seo/ -->
<meta name="description" content="newsy z branży odżywek i suplementów"/>
<link rel="canonical" href="http://soople.pl/" />
<meta property='og:locale' content='pl_PL'/>
<meta property='og:type' content='website'/>
<meta property='og:title' content=' - newsy z branży odżywek i suplementów'/>
<meta property='og:url' content='http://soople.pl/'/>
<meta property='og:site_name' content=''/>
<!-- / Yoast WordPress SEO plugin. -->
Search engines will use those, but it won’t be visible in the browser. That’s the expected behaviour.