Cookie Policy
Note: we update this policy once in 6 months.
Cookies are small text files that can be used by websites to make a user's experience more efficient.
According to EU legislation, we can store cookies on your device if they are strictly necessary for the operation of this website. For all other types of cookies, we need your permission.
This website uses different types of cookies. Some cookies are placed by third party services that appear on our pages. You can at any time change or withdraw your consent from the Cookie Policy on our website.
Learn more about who we are, how you can contact us, and how we process personal data in our Privacy Notice.
Necessary cookies.
Necessary cookies make a website usable by enabling basic functions like page navigation and access to secure areas of the website. The website cannot function properly without these cookies.
| Name |
Purpose |
Expiry |
| _gat |
Used to throttle request rate. If Google Analytics is deployed via Google Tag Manager, this cookie will be named _dc_gtm_. |
1 minute |
| AMP_TOKEN |
Contains a token that can be used to retrieve a Client ID from AMP Client ID service. Other possible values indicate opt-out, inflight request or an error retrieving a Client ID from AMP Client ID service. |
30 seconds to 1 year |
| __utmt |
Used to throttle request rate. |
10 minutes |
| __utmb |
Used to determine new sessions/visits. The cookie is created when the javascript library executes and no existing __utmb cookies exist. The cookie is updated every time data is sent to Google Analytics |
30 mins from set/update |
| __utmc |
Not used in ga.js. Set for interoperability with urchin.js. Historically, this cookie operated in conjunction with the __utmb cookie to determine whether the user was in a new session/visit |
End of browser session |
| _gaexp |
Used to determine a user's inclusion in an experiment and the expiry of experiments a user has been included in. |
90 days |
| _opt_utmc |
Stores the last utm_campaign query parameter. |
24 hours |
| zirity-session |
Used to distinguish try-on sessions. |
24 hours |
| csrftoken |
Stores authorization token for user’s session. |
24 hours |
Preference cookies
Preference cookies enable a website to remember information that changes the way the website behaves or looks like your preferred language or the region that you are in.
| Name |
Purpose |
Expiry |
| _gid |
Used to distinguish users. |
24 hours |
| __utmv |
Used to store visitor-level custom variable data. This cookie is created when a developer uses the _setCustomVar method with a visitor level custom variable. This cookie was also used for the deprecated _setVar method. The cookie is updated every time data is sent to Google Analytics. |
2 years from set/update |
| uid |
This cookie contains an identifier than enables Criteo to identify the user across different websites. |
1 year |
| optout |
This cookie enables Criteo to remember that the user made the choice not to be tracked by Criteo. |
5 years |
Analytics cookies
Statistic cookies help website owners to understand how visitors interact with websites by collecting and reporting information anonymously.
| Name |
Purpose |
Expiry |
| _utma |
Used to distinguish users and sessions. The cookie is created when the javascript library executes and no existing __utma cookies exist. The cookie is updated every time data is sent to Google Analytics. |
2 years from set/update |
Marketing cookies
Marketing cookies are used to track visitors across websites. The intention is to display ads that are relevant and engaging for the individual user and thereby more valuable for publishers and third party advertisers.
| Name |
Purpose |
Expiry |
| _opt_awcid |
Used for campaigns mapped to Google Ads Customer IDs. |
24 hours |
| _opt_awmid |
Used for campaigns mapped to Google Ads Campaign IDs. |
24 hours |
| _opt_awgid |
Used for campaigns mapped to Google Ads Ad Group IDs |
24 hours |
| _opt_awkid |
Used for campaigns mapped to Google Ads Criterion IDs |
24 hours |
| _gac_ |
Contains campaign related information for the user. If you have linked your Google Analytics and Google Ads accounts, Google Ads website conversion tags will read this cookie unless you opt-out. |
90 days |
| cto_bundle |
This cookie helps Criteo better manage the tracking solution. This bundle is Criteo’s first-party cookie, enabling personalised marketing by locally storing match keys only for users who have provided appropriate related consent. |
13 months |
| cto_optout |
This cookie helps Criteo identify the opted-out users. |
5 years |
| criteo_write_test |
Cookie used to check whether Criteo can drop cookies on the current subdomain. |
Deleted after being written |
| cto_tld_test |
Cookie used to find the higher level domain under which a cookie can be written. |
Deleted after being written |
| criteo_localstorage_check |
Cookie used to check whether Criteo can write to the local storage. |
Deleted after being written |
PDF Expert