About cookies

Most websites you visit use cookies in order to improve your user experience by enabling that website to ‘remember’ you, either for the duration of your visit (using a ‘session cookie’) or for repeat visits (using a ‘persistent cookie’).

Cookies performs many different functions, like allowing you to navigate through pages efficiently, storing your preferences, and generally improving your experience of the website. Cookies make the interaction between you and the website faster and easier. If a website does not use cookies, it will “think” you are a new visitor every time you move to a new page on the site – for example, when you enter your login details and move to another page it will not recognize you and it won’t be able to keep you logged in.

Some websites will also use cookies to enable them to target their advertising or marketing messages based for example, on your location and/or browsing habits. Cookies may be set by the website you are visiting (‘first party cookies’) or they may be set by other websites who run content on the page you are viewing (‘third party cookies’).

What is in a cookie?

A cookie is a simple text file that is stored on your computer or mobile device by a website’s server and only that server will be able to retrieve or read the contents of that cookie. Each cookie is unique to your web browser. It will contain some anonymous information such as a unique identifier and the site name and some digits and numbers. It allows a website to remember things like your preferences or what’s in your shopping cart.

What to do if you don’t want cookies to be set

Some people find the idea of a website storing information on their computer or mobile device a bit intrusive, particularly when this information is stored and used by a third party without them knowing. Although this is generally quite harmless you may not, for example, want to see advertising that has been targeted to your interests. If you prefer, it is possible to block some or all cookies, or even to delete cookies that have already been set; but you need to be aware that you might lose some functions of that website.

How this Website uses Cookies

Cookies enable us to identify your device, or you when you have logged in. We use cookies that are strictly necessary to enable you to move around the site or to provide certain basic features. We use cookies to enhance the functionality of the website by storing your preferences, for example. We also use cookies to help us to improve the performance of our website to provide you with a better user experience.

Third party cookies and embedded content

Third-party cookies

We use cookies of Third Parties which may also set cookies on their websites “on their own behalf” to support features of our websites. Tierra does not control the spreading of these cookies. It is necessary to check the third-party websites for more information about them.

Below we have provided you more information about cookies set by the Websites.

Third-party cookies are identified in the list below, together with information as to how you can opt out of receiving. This type of cookie (Third-Parties cookies) requires the user’s consent.

Cookie name Category Duration Purpose
_ga Stored cookie Expires after 2 years Used to distinguish users.
_gat Session cookie Expires after 10 minutes Used to throttle request rate.
_gid Stored cookie Expires after 24 h Used to distinguish users.
_PHPSESSID Session cookie Expires after 10 minutes Used to remind to the application the state of the user’s session.
_NID Third-Parties stored cookie Expires after 6 months With this preference cookie the browser sends this cookie with requests to Google. The NID cookie contains a unique ID that is used by Google to store your preferences and other information, such as your preferred language etc. It is possible to download the Google Analytics Opt-out Browser Add-on here:

Google Analytics

The information generated by the cookie about your use of our Site (including your shortened IP address) will be transmitted to and stored by Google on servers in the United States. Google will use this information to evaluate your use of our websites, to compile reports on website activity for website operators and to provide other services associated with the use of our Site and services related to the use of the internet. Google may also transfer this information to third-parties if this is required by law or if third-parties process this data on behalf of Google.

For more information about how Google uses your information, please see Google’s Privacy Policy:

We inform you, however, that the Google Analytics code has been integrated on this site to anonymize your IP address.


We do not sell the information collected by our cookies, nor do we disclose the information to third parties, except where required by law (for example to government bodies and law enforcement agencies).

If you wish to check what cookies are set on your device through the website, it is possible to know how to do so in the above section dedicated to third-party cookies.

Management of the cookies

Web browser cookies

If you do not want to receive cookies, it is possible to modify the browser so that it notifies you when cookies are sent, or it is possible to refuse cookies altogether. It is also possible to cancel cookies that have already been set.

If you wish to restrict or block web browser cookies which are set on your device, then you can do this through your browser settings; the Help function within your browser should tell you how to do it. Alternatively, it is possible to visit, which contains comprehensive information on how to perform this operation on a wide variety of desktop browsers.

Hereafter, some links of reference to understand the procedure to deactivate cookies on the most used browsers: