The online landscape is shifting as 18-34 year old women are now the most dominant group online in the UK - accounting for 18% of the UK internet population and over one-fifth of all UK computer time. The market research company Nielsen//NetRatings latest findings show that: 18-34 year old women are the single most prevalent demographic group, accounting for 18% of all active online Britons. 18-34 year olds are the most prevalent group, accounting for 32% of all active online Britons.