This is a Khalite-produced technology that allowed them to reach the Lerodan Star System.
Faster Than Light
A hyperdrive allows a vessel to quickly move from one star system to another in a matter of months instead of thousands or hundreds of years.
Hyperdrives are unstable, and the physical demands on starships is enormous. Only large and very structurally solid starships can handle the translation into hyperspace. Any structurally weak or unsatisfactory starship smaller than 500 meters is going to have incredible maintenance issues when using a hyperdrive, or worse, it will be ripped apart.
This technology is not yet fully canon, and needs discussion.