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What is a cookie?

Guide to cookies and how they are used on the Carbon Trust website.

So, what is a cookie?

A cookie is usually a small piece of data sent from a website and stored in your web browser while you are browsing a website. When you browse the same website in the future, the data stored in the cookie can be retrieved to notify the website of your previous activity.

What are cookies used for?

Cookies are used on more than 90 per cent of sites and serve many functions. For example, they can help us to remember your username and preferences, analyse how well our website is performing, or even allow us to recommend content we believe will be most relevant to you.

 Certain cookies contain personal information. For example, if you click on 'remember me' when logging in, a cookie will store your username. Most cookies won't collect information that identifies you, but will instead collect more general information, such as how users arrive at and use our websites or a user's general location.

These cookies are divided into the following four categories:

  • Necessary Cookies that are essential for the operation of our website
  • Functional Cookies that allow us to remember your preferences
  • Performance Cookies that analyse how our visitors use our websites and to monitor website performance 
  • Tracking/Targeting Cookies that allow social media sites and our advertisers to serve you content we believe is relevant to you

 Cookies on the Carbon Trust website:

Cookie Name Purpose
Functional Accessibility
These cookies allow the font size and language you've selected to be remembered whenever you visit our website.
Performance __utmz

Used by google analytics to provide the site owner with analysis of who uses the site, what they are looking for and other information. This allows the site owner to know what people are searching for. This information can be used in the future to improve the site content.

Google's terms of service and privacy policy are available here:

AddThis di

This set of cookies is created by using social media sharing buttons. These buttons allow users to share pages but also allow social media outlets to track users.

More information on the cookies set by AddThis and how to opt out are on the AddThis website uvc
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