Tracking software
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Find out who watches you online

14 January 2014 Last updated at 09:03 GMT

Whistleblower Edward Snowden has brought a lot of attention to how online activity is tracked.

Click's Kate Russell looks at how to track who is tracking you online.

This is an extract from Click's Webscape. Watch Webscape in full complete with web links

Watch more clips on the Click website. If you are in the UK you can watch the whole programme on BBC iPlayer.