A webmaster, also known as a website administrator, is responsible for maintaining, managing, and ensuring the smooth functioning of one or more websites. Their duties can include website design and development, updating content, ensuring website security, monitoring site performance, and optimizing for search engines (SEO). Webmasters play a critical role in the ongoing health and accessibility of a website, often working closely with content creators, marketers, and IT professionals to ensure that the site meets its goals and serves its audience effectively.