
Geotagging a photo means writing a latitude and longitude into the file itself. Here are the four steps, what the photo actually stores, and the one missing field that sends a correct coordinate to the wrong hemisphere.

Windows will show a photo's location but will not let you add one, and the Mac Photos app can accept a location that never reaches the exported file. Here is what each actually does, and the browser route that avoids both.

The claim that geotagged photos lift local rankings has now been tested: one metric of seven improved and four got worse. Here is what the evidence actually supports, what Google documents instead, and where photo location still earns its place.