Other organisations also collect user information on our sites through cookies, tags and pixels. Tags and pixels, also known as web beacons, are similar to cookies but are collected through embedded images.</p> <p>Using cookies and other technology allows other organisations to help us to analyse how our site is being used, measure the number of visitors to the site, and display advertising. To accomplish these goals, Guardian utilises cookies, tags, pixels, and other web beacons to communicate information about you to others. If you are a California or US resident, you may elect to opt out of all sales of personal information through these cookies, tags, pixels, and web beacons by clicking the “California resident - Do not sell” link located in the footer of every page or by clicking the “Do Not Sell My Personal Information” button inside our privacy banner.