The second annual Ofcom report into digital communications in the UK highlights the shift to advertising online. To quote it:

That figure is equivalent to: almost half the amount spent on all TV advertising; 83pc of advertising spend on ITV1, Channel 4 and Five; and a quarter of all press advertising.

Still more sensational: Google is scooping 40% of that advertising spend. Given the multiplicity of other advertising channels (consumers do not spend 40% of their time on Google, for instance) that is an astonishing number.