What are actors

[spodegaard (spec)]

You can read more about actors here:

Parallel Lua Beta

After a flurry of bug fixes and stability improvements, we are happy to announce the Parallel Lua project has graduated from a developer preview release to a full fledged Studio Beta! Special thanks to all the developers who kicked the tires on the developer preview and provided feedback and demos. Important Note: For now, Parallel Lua features will only work within Roblox Studio! If you publish a place that has Parallel Lua API calls, things will be very broken. The Parallel Lua APIs can be…

[It is basically container for code that can be safely split into its own thread using task.desynchronize(). It should also contain the instances used by its scripts.] (Actor | Roblox Creator Documentation)