I'm afraid ChatGPT missed the mark here, this doesn't answer the question of how to identify the first time a visitor enters a Target test and whether post_tnt_action's event=0 can be used. Thanks

As part of our Target experimentation programme, I want to explore alternative ways to evaluate our tests by using our clickstream data. I want to understand the characteristics of our users when they first enter a test - device type, marketing channel, etc.  Can I use the post_tnt_action field (str...