The linked post is worth a read. W3W seems so good on the surface, but dig a little and it’s really not.
There are better alternatives:
Open Location Codes (https://en.m.wikipedia.org/wiki/Open_Location_Code) are implemented by Google as Plus Codes (https://maps.google.com/pluscodes/)
And if you’re in the UK there is a free Ordnance Survey locator app (App Store: https://apps.apple.com/gb/app/os-locate/id810024913)
https://mastodon.green/@Philsturgeon/114360649451117125