What is a holeshot? Rackum Racing, Low Buck Garage

What is a holeshot? Holeshot device? Why is a wheelie off the starting line bad?
Short version of long version titled: "Best Holeshot Device" featuring the RACKUM - Rackum Fork Locker Holeshot device by Rackum Racing by the Low Buck Garage.
https://youtu.be/MS34a_4AbK8

https://rackumracing.com/products/forklocker-holeshot-device
Discount code: "Lowbuck10"