This was important for me to track my pitch productivity. Although it was no longer necessary information for me personally once my submission was published, I replaced the response date with the content's publication date.
Of course, if you were to do this yourself, your table might look a little different.
You might want to have two separate columns, one for the request response date and another for the publish date. You can do the same with the "Subject/URL" column, splitting it into two columns to keep the data separate.
Ultimately, the spreadsheet exists to help you document your link building efforts, and you can customize job seekers database it to best suit your marketing needs.
I responded to a total of nine inquiries on HARO in February, August, and October 2018.
If you've never seen a HARO inquiry email before, here's an example sent to my inbox to give you an idea.