Is Avalanche L1 or L2?

I'm trying to wrap my head around blockchain technology and its various layers. Could you please clarify for me whether Avalanche is considered an L1 blockchain or an L2 solution? I've read about both concepts, but I'm still a bit hazy on the distinction. It seems Avalanche has some unique features that might make it stand out in one category or the other. Could you break it down for me in a way that's easy to understand? I'd really appreciate your insights on this matter.