Do I need to embed my form every time I make an edit?

I have a JotForm I used on a website. If I make subtle changes to this form, do I need to embed the code into my website again? Or does it automatically update?

No, you do not need to re-embed if you are using the default embed codes or the iframe. They will automatically carry the updates you made in the form builder. But if you are using the source codes, you'll need to.

https://www.jotform.com/help/104-How-to-get-the-Full-Source-Code-of-your-Form