Cookies are small text files that a website stores on your device when you visit. They allow the site to remember information about your visit โ such as keeping you logged in between pages โ so you don't have to re-enter the same data repeatedly.
Cookies are not programmes and cannot carry viruses, install software, or access other files on your device. They only store the specific information the website writes into them.
Cookie use is governed by the ePrivacy Directive (2002/58/EC, amended 2009/136/EC) and the General Data Protection Regulation (GDPR 2016/679). Together they require that websites only set non-essential cookies with your informed, freely-given consent.