The short answer is the person in charge of your online presence. What about if your in charge of your own online presence, but your not a Webmaster? Now that's a problem. A webmaster will over see your complete online presence including, but not limited to: 1) The finished look, feel and function of your website. 2 ) Managing advertising displayed on your site. 3 ) Managing displaying your advertising on other websites. 4 ) Link Strategy 5 ) Domain Strategy 6 ) Landing Page strategy 7 ) A unique Keyword strategy for each individual page of your website. 8 ) Collecting & analyzing online competitive intelligence. 9 ) Using an analytics tool to track and understand the traffic on your website(s) 10 ) Managing keeping your site map up to date and submitted to the major search engines. 11 ) Manage submitting your website(s) to all major directories and search engines. I will edit and add to this as I get your questions on this posting.