[{'role': 'user', 'content': 'Analyze the following clause from a privacy policy and determine if it\'s fair or unfair. Also identify any privacy practices mentioned: Third-Party Advertising Companies We may use third-party advertising companies to serve ads on the Services. Our system and the third-party advertising technology uses information derived from Users\' activity, our cookies on your hard drive, your visits to our site, and the Services you use, to target advertising within the Services. In addition, our advertisers may use other third-party advertising technology to target advertising on our site and other sites. In the course of advertisements being served to you, a unique third-party cookie or cookies may be placed on your computer. Similarly, third-party advertising companies may provide us with pixel tags (also called "clear gifs" or "beacons") to help manage and optimize our online advertising. Beacons enable us to recognize a browser\'s cookie when a browser visits the site on which the beacon is located, and to learn which banner ads bring users to a given site.'}, {'role': 'assistant', 'content': 'This clause is unfair. The privacy practices mentioned are: Identifier_Cookie_or_similar_Tech_3rdParty.'}]