Heya! From what I can tell there's no way to set up a condition group using an OR clause. Perhaps there's a way to do it in advanced mode, but I haven't worked it out or found any docs. Is that possible?

You're right that you can't use an OR clause in simple mode. However, in advanced mode you can use MongoDB query syntax to do it:

{
  "$or": [
    {
      "condition1": "value1"
    },
    {
      "condition2": "value2"
    }
  ]
}

https://docs.growthbook.io/features/targeting#advanced-mode

Thanks ryan! Don't know how I missed this in the docs — just searching 'advanced mode' takes me to the answer. 😓