Mashable website 'to be sold for £130m' to CNN

A 26-year-old businessman from Aberdeenshire is set to become the latest internet millionaire.

Pete Cashmore started the technology website Mashable when he was a teenager.

An American media firm is said to be negotiating to buy it for more than £100m.

But what makes this website, and others like it, attract such hefty price tags?

The BBC's technology correspondent Rory Cellan-Jones explains.