What does “./” (dot slash) refer to in terms of an HTML file path location?

Question

I know ../ means go up a path, but what does ./ mean exactly?

I was recently going through a tutorial and it seems to be referring to just

Answer 1

.  = This location
.. = Up a directory

So, ./foo.html is just foo.html. And it is optional, but may have relevance if a script generated the path (relevance to the script that is, not how the reference works).