TL;DR: Just here for Browsersync setup? Skip to the steps.
I’m always looking for ways to reduce the time between saving a file and seeing changes on the screen.
When I first started working with Drupal, back in the day, I would ftp changes to a server and refresh the page. Once I found Transmit, I could mount a remote directory locally and automatically save files to the server. At the time, my mind was blown by the efficiency of it. In hindsight, it seems so archaic.