Question relating to the F.Fab and B.Fab

In the 15 video the creator brings up the Fab layers. Till now the creator adviced us to avoid this layer to avoid complexity. Can i know what this layer is capable of doing so that i can further improve my pcb with this feature?

Fab layer is for additional information that you would like to pass on to a manufacturer.

Which sometimes includes board information like :

  • Board Thickness
  • Type of Soldermask
  • Silk ink brand / type , etc.

This is usually done in a larger company to avoid miscommunication since they have a different person who does purchasing or placing the order.

Just to make the video simpler the Fab layer was avoided.