Separating conversations in Gmail

Is there a way - other than turning Conversation views off in gmail - to separate each form submission coming into my gmail account? 

Yes, you can do that in your Gmail account. Here's a guide: https://support.google.com/mail/answer/5900?co=GENIE.Platform%3DDesktop&hl=en

I hope this helps. 

Hi - yes, thanks, I know I can do this in conversations in Gmail. Is there a way to do this in JotForm instead? I've read old posts (2012 and 2015) about using the unique widget to change the subject line - but this doesn't seem to work now -  

Yes, there's a workaround for it. Try changing the Email Subject to the Submission ID. Here's a screencast guide: 

You can clone and test the demo form: https://form.jotform.com/83445117251957

Here's the result: