There are lots of acronyms in that title, so let’s break it down, starting at the end.
SIG: Special Interest Group. Basically, that’s a fancy name for a club.
e-Bike: electric bike. I.e., a bike with both pedals and a small battery-powered motor.
DIY: Do It Yourself.
So if you’re interested in making your own e-bike, either from a kit or from scratch, tune in!