What is a cookie
A cookie is a small text file that is stored by the computer when a website is visited by a user. The text stores information that the site is able to read in the moment in which it is seen at a later time. Some of these cookies are necessary for the proper operation of the site; others are useful to the visitor because they can safely store such information as the user name.
Google analytics is a web analytics service provided by Google Inc.
Google maps is a service that allows searching and viewing of maps provided by Google Inc
Twitter is a social network
Facebook is a social network
Where to find information about how to disable or manage cookies in different browsers: