Who's Tracking You? Cookiepedia - Lifting the Lid on the world of web cookies

WHO'S TRACKING YOU? COOKIEPEDIA - LIFTING THE LID ON THE WORLD OF WEB COOKIES Infographic by Cookiepedia • www.cookiepedia.co.uk OVERVIEW OF COOKIE TYPES AND VOLUME Breakdown of all cookie types 67% Strictly Necessary 1% 36 Performance 2% of cookies are of unknown Functionality 4% purpose. Targeting 26% cookies 67% Unknown 26% The average number of cookies per site, based on 10,872,563 cookies found across 299,074 websites Cookies fall into five broad categories. • Strictly Necessary cookies are vital to enable websites to function. • Performance cookies are used for analytical of cookies build user purposes. • Functionality cookies enable custom site interactions. • Targeting cookies build user profiles for marketing. • Cookies whose purpose has not been determined are classed as Unknown. behaviour profiles. FIRST PARTY VERSUS THIRD PARTY Number of cookies set by the host: Proportion of cookies set by First and Third Party hosts in each category 6,249,656 irst party first party 89% third party 11% first party 87% third party 13% first party 88% Number of cookies set by a Third Party: third party 96% third party third party 99% 12% 4,622,907 Strictly Necessary Performance Functionality Targeting Unknown 99% THE PERSISTENCE OF COOKIES of Targeting cookies are set by a Third Party. Lifespan Persisent versus Session cookies Average cookie lifespan: 1,819 days 88% of Persistent cookies are controlled by a Third Party Host. Equivalent to 4.9 years: third More than a of all cookies survive when you close your browser. These are Persistent cookies. 64% 36% of all cookies are deleted when the web browser is closed. These are Session cookies. of all cookies are Persistent cookies. TARGETING COOKIES How widespread are Targeting cookies? Top hosts of Targeting cookies across 300,000 websites This chart ranks hosts by the number of websites on which their cookies appear. The yellow numbers denote how many websites that each host's cookies have been found on. 53% Google Appnexus 119,328 32,973 29,798 24,180 22,064 Facebook Twitter of websites contain targeting cookies Addthis 17,140 16,075 13,627 11,968 11,308 Quantcast comScore Turn Statcounter 40,000 Rubicon Project half the websites you visit are contributing towards profiles about YOU! 60,000 Cookiepedia Source: data collected from Cookiepedia on 4th September 2013 www.cookiepedia.co.uk