The one in which you open a file in a specific app
Tips from Alfred blog: Tweaking your search... →
We all use our Macs slightly differently, squirrelling files away in all sorts of obscure locations with, sometimes, less than helpful names or folder organisation. This is where Alfred comes in, like a knight in shining armour against the mountains of files on your Mac. Go to the blog post above for a few ways to tweak your settings to ensure Alfred is ready to serve YOU.
Tips from Alfred blog: Using custom searches →
For a great overview of how you can use custom searches in Alfred most efficiently, head to our official blog where Vero writes a nice summary productivity post!