Welcome to the forum! I'm Dan from Southern California.
Fretwork is a technique done with a fret saw or a scroll saw. There are many types of projects that can be done with a scroll saw such as fretwork, Intarsia, jigsaw puzzles, marquetry, inlay and even bowls and boxes. So you can call it fretwork if you like!
Start reading here and you should be able to catch up real fast. So, come on in and join the fun!