First-party cookies are set by the website you are visiting and they can only be read by that site. They can make your experience on the web more efficient by recording your browsing activities, such as which pages and content you’ve looked at, when you visited, what you searched for and whether you clicked on an ad.
Third-party cookies are set by a different organisation to the owner of the website you are visiting. This could be a company advertising on the site you’re visiting, for example, or a site that contains embedded content, such as Twitter or Facebook. Those websites may send you cookies and they control the setting of those cookies, not the site you are visiting.
Session cookies are stored temporarily during a browsing session and are deleted from the user’s device when the browser is closed. Persistent cookies This type of cookie is saved on your computer for a fixed period and is not deleted when the browser is closed. These cookies are used to save your preferences so that they persist when you return to the website.
Flash cookies work in a different way to web-browser cookies (first-party, third-party, session and persistent cookies are all set via your browser). Rather than having individual cookies for particular jobs, a flash website is restricted to storing all data in one cookie. You can control how much data can be stored in that cookie, but you cannot choose what type of information is allowed to be stored.