I have used data merge to create 100 PDFs, how do I save each one individually with its own name?
There's scripts and plugins you can get to do this within InDesign but it doesn't do it (to my knowledge) natively.
I don't bother with scripts or plugins and instead will just open the PDF in Adobe Acrobat after and then its hard to find but go to:
Organize Pages → Split
That will let you separate the document into individual PDFs. You can also Extract and Combine PDF's using Acrobat.