What is a cookie and what is it user for?

A cookie is a small file that is stored on the user’s computer, tablet, smartphone or any other device with browsing information.

All our user’s cookies help us to improve the quality of our website, allowing us to find out which pages are useful, which are not and which can be improved.

Cookies are essential for the internet to function correctly, providing countless advantages in the provision of interactive services, facilitating browsing and improving the usability of our website.

Cookies will not harm your device in any way. In fact, activating cookies helps us identify and find solutions to errors.


Own Cookies

We use technical cookies, personalization cookies and session cookies, which are sent to the computer from our own servers or domains. Without these technical cookies, the website could not provide its service, nor function properly, nor could display correctly the contents of the website.

Cookie nameDurationDescription
cookie-consent1 yearTechnical cookie that checks if the cookie message has been acepted, both implicity and explicity.


Thirth-Party Cookies

Third-party cookies are used, which we now specify below:

– Google Analytics Cookies: Google Analytics supports three JavaScript libraries (tags) to measure the use of websites: gtag.js, analytics.js and ga.js, which use cookies that store technical information to generate portal usage statistics (pages visited, new visits, etc.) On this website we use IP anonymization in Google Analytics, to avoid storing the information of the user’s full IP addresses: https://support.google.com/analytics/answer/2763052?hl=en

  • Google is a company adhered to the Safe Harbor Agreement that guarantees that all transferred data will be treated with a level of protection according to European regulations. You can consult detailed information in this regard in the following link: https://www.privacyshield.gov/participant?id=a2zt000000001L5AAI&status=Active.
  • Google Privacy Policy: https://policies.google.com/privacy?hl=en-GB
  • Google Analytics cookie usage on websites: https://developers.google.com/analytics/devguides/collection/gtagjs/cookie-usage
  • How Google use Cookies: https://policies.google.com/technologies/cookies?hl=en-GB
  • How Google uses information from sites or Apps that use our services: https://policies.google.com/technologies/partner-sites?hl=en-GB
  • To offer visitors more options on how their data is collected by Google Analytics, Google developed the Opt-out Browser Add-on: https://tools.google.com/dlpage/gaoptout?hl=en-GB When installing this add-on, the information will not be sent to Google Analytics.
  • Cookies used by gtag.js and analytics.js:
    Cookie nameDurationDescription
    _ga2 yearsUsed to distinguish users.
    _gid24 hoursUsed to distinguish users.
    _gat1 minuteUsed to throttle request rate. If Google Analytics is deployed via Google Tag Manager, this cookie will be named _dc_gtm_ _dc_gtm_<property-id>.
    AMP_TOKEN30 seconds to 1 yearContains 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.
    _gac_<property-id>90 daysContains 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
  • Cookies used by ga.js:
    Cookie nameDefault Expiration TimeDescription
    __utma2 years from set/updateUsed to distinguish users and sessions. The cookie is created when the javascript library executes and no existing __utma cookies exists. The cookie is updated every time data is sent to Google Analytics.
    __utmt10 minutesUsed to throttle request rate.
    __utmb30 mins from set/updateUsed to determine new sessions/visits. The cookie is created when the javascript library executes and no existing __utmb cookies exists. The cookie is updated every time data is sent to Google Analytics.
    __utmcEnd of browser sessionNot 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.
    __utmz6 months from set/updateStores the traffic source or campaign that explains how the user reached your site. The cookie is created when the javascript library executes and is updated every time data is sent to Google Analytics.
    __utmv2 years from set/updateUsed 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.


– Youtube Cookies: On this website we insert YouTube videos from our official YouTube channel and other channels, using YouTube’s enhanced privacy mode. By activating this mode, YouTube does not store information about people who visit this website, unless they play the video. Thereby you can create cookies on your computer in the event that you view any of these videos, but YouTube will not store any personal information that allows you to identify it, by viewing a video with the privacy mode improved.


Cookies that can be used at dkristal.com when activating Hotjar Analytics services, and Facebook Pixel public services, and LinkedIn Insight Tag:

– Facebook Pixel: On this website we use the Facebook Pixel, which uses cookies in order to provide measurement services and segmented ads. The Facebook pixel is used for advertising and analysis, which allows the use of advertising features, such as audiences, conversions, segmentation, optimization, and Facebook Analytics data.

  • The Facebook pixel is a tool of Facebook Inc, a company adhered to the Safe Harbor Agreement that guarantees that all data transferred will be treated with a level of protection in accordance with European regulations.
  • Facebook Private Policy (Data Policy – printable version): https://www.facebook.com/about/privacy/update/printable
  • Facebook Cookies Policy (prinable version): https://www.facebook.com/policy/cookies/printable
  • Website visitors can check Facebook ads configuration and update their preferences at any time.
  • Facebook Pixel Cookies: https://www.facebook.com/business/help/471978536642445
    Cookie nameDescriptionFunctionExpires
    Facebook - _fbpThis cookie will help deliver our advertising to people who have already visited our website when they are on Facebook, or on a digital platform powered by Facebook Advertising.Targeting/ Re-marketing cookiesSession


– LinkedIn Insight Tag: in this Website we use LinkedIn Insight Tag

  • The LinkedIn Insight Tag is a tool of LinkedIn Corporation, whose affiliate responsible for data for the European Union (EU) is LinkedIn Ireland Unlimited Company, based in Wilton Place, Dublin 2, Ireland.
  • Private Shield LinkedIn Corporation: https://www.privacyshield.gov/participant?id=a2zt0000000L0UZAA0
  • LinkedIn Privacy Policy: https://www.linkedin.com/legal/privacy-policy
  • LinkedIn Audience Matching Conditions and conversion tracking: https://www.linkedin.com/legal/conversion-tracking
  • Cookies used by LinkedIn Insight Tag:
    DomainCookie nameDescriptionExpiresOrigin
    .linkedin.comlidcUsed for routing1 dayShare buttons and add tags
    .linkedin.combcookieBrowser identification cookies1 yearShare buttons and add tags
    www.linkedin.combscookieSafe browser identification cookies1 yearShare buttons and add tags
    www.linkedin.comL1cSafe browser identification cookies1 sessionLinkedIn insights tags and add tags
    ads.linkedin.comBizoIDLinkedin Ad Analysis6 monthsLinkedIn insights tags
    ads.linkedin.comBizoIDataLinkedin Ad Analysis6 monthsLinkedIn insights tags
    ads.linkedin.comBizoUserMatchHistoryLinkedin Ad Analysis6 monthsLinkedIn insights tags
    ads.linkedin.comBizoNetworkPartnerIndexLinkedin Ad Analysis6 monthsLinkedIn insights tags
    www.lynda.comtokenAccess token4 hoursEmbedded Presentation
    www.lynda.comPlayer_settings_0_3Player Settings3 weeksEmbedded Presentation
    .lynda.comLyndaLoginStatusLogin Status10 yearsEmbedded Presentation
    www.lynda.comthrottle-XXXAcceleration in Lynda6 monthsEmbedded Presentation
    www.lynda.comNSC_XXXLoad balance5 minutesEmbedded Presentation


Multilanguage cookies: in dkristal.es we use the following multi-language cookies:

Cookie nameDescription
_icl_current_languageRemember the selected language
_icl_visitor_lang_jsStores the language to which the user has been redirected
wpml_browser_redirect_test Check if cookies are enabled
wpml_referer_urlStore the previous navigation URL



You can allow, block, or delete cookies installed on your device by changing your Internet browser setting options. If you do not allow cookies to be installed on your browser, you may not be able to access some of the services and your experience on our website may be less satisfactory.
In the following links you can find all the information you need to configure or disable your cookies in each browser.


Google Analytics: To offer visitors more options on how their data is collected, Google developed the Opt-out Browser Add-on: https://tools.google.com/dlpage/gaoptout?hl=en. When installing this add-on, the information will not be sent to Google Analytics.

On the other hand, and apart from the systems of configuring or disabling the cookies that we have just detailed for the most used browsers, there are online tools that allow you to configure and manage your preferences regarding the cookies you accept. Some of them are:

On these pages you can also manage your preferences related to personalized advertising.


Following the Guide of the General Regulation of Data Protection of the Spanish Agency for Data Protection, regarding Bases of Legitimation for the Processing of Data, we consider that “The consent can be unequivocal and granted implicitly when it is deducted from an action of the interested party (for example, when the interested party continues browsing a website and thus accepts the use of cookies to monitor their browsing). ”