What god is Aton?

Could you please clarify for me, what exactly is the deity known as Aton? I understand that it may have been a significant religious figure in ancient Egypt, but I'm curious about its origins, its significance within the Egyptian pantheon, and how it was worshipped by the people of that time. Additionally, I'm interested in knowing if there are any modern-day connections or interpretations of the god Aton that are still relevant today.