Google Search result text

I created this site Penzl.net. But I want to change the text that comes up in google when you type in Penzl.net. At the minute it displays “PENZL · galerija · certifikati. This jQuery slider was created with the free EasyRotator for WordPress plugin from DWUser.com. OK. Rotator powered by .” How do I change this? also the link below that “https://penzl.net/ 2013-03-“? it would be better if it was “Certifikati” button.