[{'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: Advertising helps keep WeChat and many of our other services free of charge and useful to you. Tracking technologies help make our advertising: more effective for advertisers - for example, by delivering them further information regarding who has viewed their advertisements; more safe for you - for example, by ensuring that you do not receive repeated or fraudulent advertisements or prohibited content within such advertisements; and more relevant to you - for example, by delivering advertisements based on which official WeChat channels you may have followed or based on your location."}, {'role': 'assistant', 'content': 'This clause is unfair. The privacy practices mentioned are: Identifier_Cookie_or_similar_Tech_3rdParty, Location_3rdParty.'}]