Last updated: 13 August 2026
This page explains what the preference box that appears when you arrive on the site actually means.
Nothing. No cookie is placed, nothing is written to your browser, nothing is measured and no external server is contacted. The site works exactly as it would otherwise, with every feature. None of what is described on this page applies to you.
Two measurement systems run. Google Analytics places two cookies: _ga and a second one beginning with _ga; both are kept for two years and serve to recognise that the same visitor has returned — not who you are, but that it is the same browser. Our own system does not use a cookie: it generates a random number that lives as long as your tab stays open and sends it along with the measurement request to our server, in order to link which pages were opened within the same visit. When you close the tab, that number is deleted. Apart from these, only your preference above is kept in your browser, so the box does not appear on every visit.
How many times each page was opened, how long visitors stayed, which country and which kind of device they came from, and how they reached the site (search, social media, direct). Your name, email address and telephone number are not part of the measurement — we learn those only when you write to us yourself. Our own system does not store your IP address either: it is turned into an irreversible identifier using a secret key that changes every day.
Clearing the site data in your browser is enough; the preference box appears again. You can also delete the Google Analytics cookies individually from your browser settings.
Measurement and correspondence are separate things. The data processed when you write to us by email or WhatsApp is explained not here but in the privacy notice: