There have been many bold claims about the importance of the internet in this election campaign, and the political parties are investing a huge amount of effort into trying to reach their supporters and undecided voters through social media websites such as Facebook, Twitter and YouTube.

Steve Hewlett, presenter of Radio 4's Media Show, has taken a trawl through cyberspace to see how decisive the web could be to the election outcome.

To get the latest election news from Radio 4, subscribe to our RSS feed .

Get in touch with Today via email , Twitter or Facebook or text us on 84844.