Who are Lido node operators?

Could you please explain to me, in detail, who are Lido node operators? I'm quite curious about their role in the cryptocurrency and blockchain ecosystem. Are they simply technical experts who manage and maintain nodes? Or do they play a more significant part in the overall network? Could you also elaborate on the responsibilities and benefits associated with being a Lido node operator? It would be greatly appreciated if you could provide some insights into this fascinating topic.