A Google Sites developer designs, creates, and manages websites using Google Sites, a structured wiki and web page creation tool. They utilize Google's platform to build interactive, user-friendly sites, integrating various Google services like Google Docs, Google Calendar, and YouTube. They are responsible for layout design, content update, and troubleshooting any issues. They work closely with clients, understanding their needs, and translate them into functional web solutions. They also ensure the website's compatibility across different browsers and devices. Additionally, they are in charge of implementing SEO strategies and maintaining the website's security.