Based on the entity that manages the domain from where the cookies are sent and processes the data obtained, two types can be distinguished:

• First-party cookies: those that are sent to the user’s terminal device from a machine or domain managed by the publisher itself and from which the service requested by the user is provided.

• Third-party cookies: those that are sent to the user’s terminal device from a machine or domain that is not managed by the publisher, but by another entity that processes the data obtained through the cookies.

If the cookies are installed from a machine or domain managed by the publisher itself, but the information collected by them is managed by a third party, they cannot be considered as first-party cookies.

There is also a second classification based on the length of time they are stored in the client’s browser, which can be:

• Session cookies: Designed to collect and store data while the user accesses a website. They are usually used to store information that only needs to be kept for the provision of the service requested by the user on one occasion (e.g., a list of purchased products).

• Persistent cookies: The data remains stored on the terminal and can be accessed and processed for a period defined by the person responsible for the cookie, which can range from a few minutes to several years.

Lastly, there is another classification with five types of cookies based on the purpose for which the obtained data is processed:

• Technical cookies: Those that allow the user to navigate through a website, platform, or application and use the different options or services that exist therein, such as controlling traffic and data communication, identifying the session, accessing restricted access parts, remembering the elements that make up an order, carrying out the purchase process of an order, processing the request for registration or participation in an event, using security elements during navigation, storing content for the dissemination of videos or sound, or sharing content through social networks.

• Personalization Cookies: allow the user to access the service with some general pre-defined features based on a series of criteria on the user’s terminal, such as the language, the type of browser through which they access the service, the regional configuration from where they access the service, etc.

• Analysis Cookies: allow those responsible for them to track and analyze the behavior of users of the websites to which they are linked. The information collected through this type of cookies is used in measuring the activity of websites, application, or platform, and for the creation of user navigation profiles of these sites, applications, and platforms, with the aim of introducing improvements based on the analysis of the data usage by the users of the service.

• Advertising Cookies: allow for the most efficient possible management of advertising spaces.

• Behavioral Advertising Cookies: store information about users’ behavior obtained through continuous observation of their browsing habits, which allows for the development of a specific profile to display advertising based on it.

• External Social Network Cookies: are used so that visitors can interact with content from different social platforms (Facebook, YouTube, Twitter, LinkedIn, etc.) and are generated only for users of these social networks. The terms of use of these cookies and the information collected are governed by the privacy policy of the corresponding social platform.