This splits each line on a delimiter and returns a chosen field — the third comma-separated value from every row, for instance.
Reducing a table to a column
Pasted tabular data contains several fields per line when the task needs only one. Extracting that field gives a clean single-value list.
Typical need
Pulling just the URLs out of a report that also carries positions, volumes and dates, so the URLs can be fed into something that expects a bare list.
Faster than a spreadsheet round trip
Copy the rows, extract the column, work with the result. No import dialog, no delimiter settings, no temporary file.
Try it: Split by Delimiter / Extract Column on SeoWolf's Notepad.