HTTP Request "Stop"

Hi Folks,

I’m bit confuse how to use “Stop”.
When I generate HTTP request, it automatically generated below Stop within Human and AI. I’ve review the doc(OpenAI API) and for me it is still confuse. Does anyone could explain with in a sample?

Also, in Chat(, it includes different chats. Does conversation will inherit within same Chat? If yes, how HTTP request could send POST request to each chat?

“stop”: [
" Human:“,
" AI:”