I'm assuming that this is in a config file you're editing in a particular directory. The path is "relative" to where you currently are (your current working directory).
Relative path example: ../to/file.ext
* This means if you go up a directory, you'll find a subdirectory called "to" that has the file in it.
Relative path example2: to/file.ext
* This means that in your current directory, there's a subdirectory called "to" that has the file in it.
Relative path example3: file.ext
* This means that the file is in your current directory.