A cookie is a small textfile which websites store on your computer, smartphone or similar device.
There are so called first party cookies and third party cookies. First party cookies can only be used by the website you visit, but third party cookies can be used by third parties connected to that website, for example analytics, tracking, etc.
Two types of cookies are used, session cookies that are deleted when you close the browser, and persistent cookies which are not deleted automatically upon closing the browser. Persistent cookies can be used to remember your preferences and such, so you won't have to repeat yourself, for example by closing the Cookie notice popup.
This site is based on Piwigo, a free open source image gallery. Piwigo only uses a necessary first party session cookie which gets deleted as soon as you close the browser. But, for the Cookie notice popup to not appear again when closed, it sets a persistent cookie on your computer to remember the choice for 90 days.
PS, this website may contain links to other websites where cookies are used. We have no control over any of those cookies.