Advertising cookies: These cookies are used to deliver adverts more relevant to you and your interests. They are also used to limit the number of times you see an advertisement as well as to help measure the effectiveness of advertising campaigns. They are usually placed by advertising networks with Prezi’s – as the Website operator’s – permission. They remember that you have visited a website and this information is shared with other organisations such as advertisers. Quite often advertising cookies will be linked to site functionality provided by third parties.</li> </ul>How can I control or delete cookies?<p>