Are those that allow the user to navigate through the website, and enable the use of the various options or services it offers. For instance, navigation and data transfer throughout the site, session identification, access to restricted web parts, storage of items in your cart, enforcement of security features during navigation and content storage for video or sound broadcasting.
Are those that allow users to access the service with some general predefined or user-defined features. For example, your language, the type of browser through which you access the service, geolocation of the device from which you access the service.
Are those that allow the efficient management of advertising spaces included in the website. They allow the system to adapt the content of advertising so that they're relevant to the user and to avoid showing ads that the user has already seen.
Statistical analysis cookies
Are those that allow the monitoring and analysis of the user's behavior on websites. The information gathered through such cookies is used for measuring the activity of web sites and applications in order to profile the user's navigation throughout them. This allows the developers to make improvements to the service, depending on the navigation flows.
Third party cookies
Some websites can install cookies from third parties, such as Google Analytics and Comscore, that allow the webmasters to manage and improve the services offered.
How to manage cookies in your browser?
Users can choose to allow, block or remove the cookies that are installed on their computer by configuring their browser's options:
In Google Chrome:
Click on the menu in the toolbar.
Click Show advanced options.
In the 'Privacy' section click the Content Settings button.
Configure the Cookies section as you desire.
In Mozilla Firefox:
At the top of the Firefox window click the Tools menu.
Select the Privacy panel.
In Firefox you can select "Use custom settings" to configure your cookies and history preferences.
In Internet Explorer 9:
At the top of Internet Explorer window, click on the Tools menu.
Select the Security tab and use the Delete browsing history to remove cookies.
Enable Cookies check box, and then click Delete.
Select the Security tab, and enter Settings. Move the slider to the top to block all cookies or totally down to allow all cookies. After that, click OK.