Do we have to wait?

Hi A quick question,

If I ask Chat GPT to do a task such as write me an essay etc. I am using the pro trial, and it is on the Thinking option. I see it is doing its thinking etc ... do I have to keep the tab open and PC on or if I close the tab / PC will ChatGPT still process it? Or do I have to wait for completion?

Hope that makes sense

I would ask chat GPT this question but its busy thinking and dont want to confuse it lol