Aviva is a multinational insurance company that offers various financial services. "Rocks" could potentially be a colloquialism or a metaphor, but without more context, it's difficult to provide a specific explanation.

Get ready for a rockin' good time! Aviva Rocks Free is a highly anticipated event that's about to take the music scene by storm. If you're a music lover, a fan of rock music, or just looking for a fun day out, then this is the event for you.