Webmaster

A webmaster can be either a Web developer or a Web designer. Usually, the webmaster works alone doing both jobs as he or she maintains a Web site. In addition, a webmaster may be responsible for search engine optimization (SEO), Web content writing, and/or marketing.

In larger organizations, a webmaster may be more of a project manager, overseeing the work of Web designers and Web developers. Additionally, the webmaster may be in charge of system performance, usability testing, usage tracking and other administrative-like tasks.

Source: webreference.com