[{'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: To improve our commercial and promotional initiatives, and to analyze the pages visited and searches performed by users, in order to improve our content and product offerings and to personalize content (and its presentation) and services. To send information or messages by email about new services, display advertising or promotions, or banners of interest to our users, or news about PSafe. Should the user prefer, he may request at any time that he be excluded from the lists related to sending promotional or advertising information, by sending an e-mail to privacidade@psafe.com."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]