It is global, once you set it up it applies to all new conversations. You are given two prompts (and the ability to toggle them on/off): * What would you like

It is global, once you set it up it applies to all new conversations. You are given two prompts (and the ability to toggle them on/off): * What would you like ChatGPT to know about you to provide better responses? * How would you like ChatGPT to respond?