Aliases
An alias is a name for one cell on the map, shared by everyone. Names are first come, first served: once a cell is named, that name is taken.
Yours
You are not signed in, so no names are yours yet. You can name cells while signed out; sign in and you can claim those names, rename them, and give them up again.
Find an alias
Search either way: type a name to find the cell it points at, or type a word pair to find the name somebody gave it.
Type at least two characters.