Not sure where to start right? The first thing you could do is to find out what exactly are you bored about? Is it your role? The company?
Are you unhappy about your boss? Your team members? Your benefits?
What would bring challenges to your day to day work?
If you think about what made your job excited, challenging, and feel happy when you first started, you will find clues as to what makes you feel bored, unchallenged, and unhappy.