In order for the website to function properly, we sometimes place small files – so-called cookies – on your device. This is common for most websites.

What are cookies?

A cookie is a small text file that a web portal leaves on your computer, tablet computer or smartphone when you visit it. It allows the portal to “remember” certain entries and settings (e.g. login, language, font size and other display preferences) over a period of time, so you don’t have to do this again each time you visit and navigate the portal.

How do we use cookies?

These cookies are used on our websites to store website display information, such as your preferred language or region. For example, if your region has been saved, a website may display the local weather forecast or local traffic news. You can also use these cookies to personalize the font size and style and other areas of the website.

If you lose the information in a setting cookie, using the site may become more cumbersome, but it usually does not cause the site to fail.

Most Google users have a preference cookie called “PREF” in their browsers. A browser sends this cookie with requests to Google websites. The PREF cookie may store your preferences and other information, including your preferred language (e.g., English), how many search results you want to see per page (e.g., 10 or 20), and whether you want the Google SafeSearch filter to be enabled.

We use security cookies to authenticate users, prevent fraudulent use of credentials and protect user information from unauthorized access.

For example, we use so-called SID and HSID cookies, which record a user’s Google Account ID and last login time in digitally signed and encrypted form. The combination of these two cookies enables us to block many types of attacks. For example, we stop attempts to steal information from forms you fill out on websites.

Process cookies help ensure that a website responds correctly and provides the expected services. This includes navigating through web pages and accessing protected website areas. Without these cookies, a website will not function properly.

For example, we use a cookie called “LBCS”, which in Google Docs allows multiple documents to be opened in one browser. If this cookie is blocked, Google Docs will not function properly.

We use cookies to make ads more appealing to users and more valuable to publishers and advertisers. Cookies are typically used to select user-relevant ads, improve campaign performance reporting, or to prevent a user from seeing the same ads more than once.

Google uses cookies such as the PREF, NID, or SID cookie to personalize ads in Google products such as Google Search. For example, we use cookies to track your most recent searches, your previous interactions with an advertiser’s ads or search results, and your visits to an advertiser’s website. This allows us to provide you with customized advertising on Google.

We also use cookies for ads that we serve across the web. Our most important ad cookie for non-Google sites is called an “ID”. It is stored in browsers under the domain We also use other cookies, such as “_drt_”, “FLC” and “exchange_uid”.

Sometimes a cookie is set for the domain of the website visited. Our DoubleClick product may set a cookie named “__gads” for the domain of the website you visit.

Other Google products such as YouTube may also use DoubleClick cookies to serve more relevant ads. Learn more about ads and YouTube.

Google also uses conversion cookies, primarily to help advertisers determine how many of the people who click on their ads end up buying their products. These cookies allow Google and the advertiser to determine that you clicked on the ad and then visited the advertiser’s website. Conversion cookies are not used by Google to target interest-based ads and are only stored for a limited period of time. These cookies are generally set in the domain or in the domain. Conversion cookie data may also be used in conjunction with your Google Account to associate conversion events with your various devices. However, only anonymous conversion data extracted from these cookies is shared with advertisers.

Some of our cookies can also be used to measure conversion events. For example, DoubleClick and Google Analytics cookies can be used for this purpose and placed in the domain of the website you visit.

Session status
Websites often collect information about how users interact with a website. This includes, for example, which pages users visit most frequently and whether they receive error messages from certain pages. We use these so-called “session status cookies” to optimize our services and thus improve surfing for our users. However, blocking or deleting these cookies does not affect the use of the website.

These cookies can also be used to anonymously measure the effectiveness of PPC (pay per click) and affiliate ads.

For example, we use a cookie called “recently_watched_video_id_list” that YouTube uses to track which videos were last viewed in a particular browser.

Google Analytics is Google’s analytics tool that gives website and app owners insights into how their users interact with the resources they offer. Google Analytics may use certain cookies to collect data and share website usage statistics without obtaining information that would make individual users personally identifiable to Google.

In addition to sharing usage statistics, the Google Analytics pixel tag, along with some of the advertising cookies described above, may also help to deliver more relevant ads within Google products such as Google search and across the web.

Further information on Analytics cookies and data protection

Google Cookies:

__utma, unlimited: This cookie contains information about when the visitor was first on the site, how many times he visited it, and when he last visited it.

__utmb, until end of session: This cookie contains a timestamp of when the visitor has visited the page. Together with __utmc, this cookie can provide information about how long the visitor has been on a page.

__utmc, 30 minutes: This cookie contains a timestamp of when the visitor left the page. Together with __utmb, this cookie can provide information about how long the visitor has been on a page.

__utmk, unlimited: This cookie contains a hash value of all UTM cookies mentioned here.

__utmv, unlimited: This cookie is intended for individual content, can be freely assigned and thus serves to control user-defined analyses.

__utmx, 2 years: This cookie contains values of the Google Website Optimizer.

__utmz, 6 months: This cookie contains information about where the visitor came from before he/she visited the page to be analyzed. It may contain information about search engines and the search terms entered there, or where on earth the calling IP address is located.

Other Google Cookies:

_ga, 2 years: Used to distinguish users

_gat, 10 min: Used to create tracker objects.ztdst, session; contains a unique hash value per visitor and is used to store the _utm cookies from Google. In addition, the IP address, browser language and start page are stored.

Control over cookies
You can control and/or delete cookies at will. You can find out how here: You can delete all cookies stored on your computer and set most browsers to prevent the storage of cookies. However, you may then have to make some settings manually each time you visit a page and accept the impairment of some functions.

Deactivate cookies
Data protection laws give users the option of disabling (“opting out”) cookies that are already installed on your device. This option applies to “technical cookies” (art. 122 of the Italian Privacy Code) and other cookies that the user has previously accepted (“opt in”). The user can deactivate and/or delete (“opt out”) cookies through the browser settings.

Certain cookie settings
Most web browsers have certain cookie settings that you can change. You can set the browser to block cookies or delete certain cookies. In general, your browser settings will also allow you to control similar technologies in the same way as cookies. The following links show how to adjust the settings of the browsers you usually use:

Internet Explorer
If you block cookies, it is possible that the functionality will be impaired.

Further InformationFor more information about the use of cookies and how to block them, please visit:,www.yo… (Europe) or (USA).