edited.
Moderators server the public interest by keeping threads on topic, moving threads posted in the wrong sections, helping answer questions about website interaction, advising members when they've violated a website policy or etiquette and working on certain projects to help keep the website on track and of interest.
Administrators do those things also to a degree but also focus on database integrity, technical issues, coding and other behind the scenes operation functions.
Additionally I wanted to ensure there was a backup in case I should catch an early flight to another plane of existence.