What Does a Webmaster Do?

The role of a Webmaster is defined by Wikipedia as thus:

“The webmaster, also called the system administrator, the author, or the website administrator, is the person responsible for designing, developing, marketing, or maintaining a website.”

This is a good, but fairly general description of the role. The actual role will of course have infinite combinations of tasks depending on the type of websites(s) a Webmaster looks after, or the size and type of the business.