Is Mina a layer 2?

Could you please clarify for me whether Mina qualifies as a layer 2 solution? I've been hearing a lot about layer 2 technologies in the cryptocurrency sphere, and I'm curious about how Mina fits into this picture. Could you explain what characteristics define a layer 2, and how Mina meets or differs from those criteria? It would be helpful to understand the role that Mina plays in the broader cryptocurrency ecosystem, especially in terms of scalability and interoperability. Thank you for your assistance in clarifying this matter.