Interesting insights on digital advertising and mobile from the good Sir Martin who runs the largest ad agencies in the world.

Key stats:

• we spend 25/30% of our time online (it's 30% of WPP revenues)
• but digital accounts only 17/18% of advertising budgets ("sad")
• mobile is 0.5% of budgets but 7% of our time
• WPP very focussed on mobile ("the greatest potential")
• PCs, tablets & smartphones are converging

Thanks to @justincooke for the spot.