How to split Mail Merge into separate documents

There are tons of videos of how to split Mail Merge into separate documents or PDFs, but they all contain various workarounds or third-party tools:

But they all exist because Mail Merge does not produce multiple output files and you have to do it yourself. Instead use MergeGuru as it will produce separate files (PDF or Word) and even rename the output files as you wish. The name of the output files are fetched from the Excel file where MergeGuru will look for a column named “Filename”.

MergeGuru – Filenames are fetched from the optional column “Filename”
MergeGuru – Produces separate files
MergeGuru – Avoid splitting of files in Mail Merge by using MergeGuru

MergeGuru creates multiple PDF and Word files from a Word template and Excel data