What is a Cookie?

A cookie is a text-based file located onto your computer containing information that can be accessed by the visited website. Generally, cookies help enhance the user’s experience whenever they visit a website. What define cookies are 3 basic characteristics:

1. Statistical reporting

Website owners can be helped by statistical reporting in order to enhance the features of their website for the user needs.

2. Behavioural Advertising

A user can conduct a search for a certain product for which he/she is interested in.  The cookie can identify the product for which the user is interested in and consecutively -the cookie- will display advertisementswhich are relevant to the user queries.

3. Tracking conversions

When a user visits and online shop, he/she can browse products and consecutively he/she can select products for which he/she is interested in purchasing.  In other words, online commerce websites use cookies to recognize you and speed up the shopping process the next time you visit the website.

Type of Cookies

The most common types of cookies which can be found on most websites are:

Geotargeting cookies

Completely anonymous and identifies the country that the user comes from.

Third party cookies

Social media sharing buttons (e.g. Tweet Share, Facebook, Google+ etc)

Registration Cookies

These cookies identify on which account the user is signed in with. Also it enables the use of other server-side technologies such as sessions.

Advertising Cookies

These cookies are also anonymous and they store information about the content that the user is browsing. They are used by advertising networks to serve relevant ads to the users.

Google Analytics cookies

They are also completely anonymous as they do not recognise the true identity of the user. These cookies are solely used to collect information on how users use the website, which pages they use more often, from which country they come etc.


The cookie law

Follow this link to know more.

© 2017 Metropolitano de Lisboa, EPE