See it before you remove it
The tool shows you the coordinates it found and links them to a map, so you can confirm what a recipient would have seen. That is usually more persuasive than a list of field names, and it tells you immediately whether the photo was taken somewhere you mind disclosing.
GPS is not stored in one place
Coordinates live in a dedicated section of the EXIF block, but a location can also appear as a place name in XMP, written by editing software that resolved the coordinates into a city. Cleaning removes both.
One photo is enough
You do not need to leak location repeatedly. A single tagged photo of something at home establishes an address, and it stays established. This is why checking before sending matters more than any settings change.