The Upload Wizard prompts you to enter lat and long in two boxes. It is often more convenient to enter them as a single piece of text formatted as lat/long, because you can copy-paste that directly out of a URL for most mapping applications. Examples:

• https://www.google.com/maps/@42.0361168,-70.1720344,15z
• https://www.openstreetmap.org/relation/2387634#map=15/42.0345/-70.1821

It would be really nice if you could paste the full mapping application URL and have the relevant data items parsed directly from that.