This Video is for those who are having trouble with the Vertex Tool (Requested help from a previous video).
Note, I am using Blender Version 2.8 and this should also work for future versions.
The Hot Key for both options are F and J, of you can use the menu (as I did in the video).
F will add a new Face or Edge from the Vertices
J will Connect Vertex Path, and this it the option we want to use.
I hope this quick video helps!..