Another significant trend regarding future of advertising is the growing importance of the niche market using shared hosting niche or targeted ads. Also brought about by the Internet and the theory of The Long Tail, advertisers will have an increasing ability to reach specific audiences. In the past, the most efficient way to deliver a message was to blanket the largest mass market audience possible. However, usage tracking, customer profiles and the web hosting review growing popularity of niche content brought about by everything from blogs to social networking sites, provide advertisers with audiences that are smaller but much better defined, leading to ads that are more relevant to viewers and more effective for companies' marketing products. Among others, Comcast Spotlight is one email hosting such advertiser employing this method in their video on demand menus. These advertisements are targeted to a specific group and can be viewed by anyone wishing to find out more about a particular business or practice at any time, right from their home. This causes the viewer to become proactive and actually choose what advertisements they want to view.