The default option between the label and the first option is what will be preselected from your choices. (Thank you @RealityMoez for the default value explanation below)
I have a word count with my character limit option because humans know words. Yet GPT is more precise with characters because, depending upon situations, the average word length is 5-6.5 characters, excluding grammar bits.
Yup. The variable hint lets you prompt users on what sort of value or input your prompt is expecting, to give them some cues and clues on what they can enter. That’s essential when it is completely freeform, and you as the prompt creator cannot be sure exactly what value they’d give there.
When working with dropdowns, you are providing a ‘multiple choice’ question, rather than an open question, and the user can only give an answer in one of your pre-set options. Therefore you don’t need to give them a hint, your options already did that.