Vector marking is virtually the same thing as vector cutting however you’re using a low enough power that instead of cutting through the material it only marks the surface instead.
This method can be substantially faster when compared to standard raster engraving depending on your design – let’s take a drink coaster as simple example which has a small logo on the middle and then a border around the entire edge.
If you ran the entire job as a raster the laser head would have to travel back and forth over the entire coaster to engrave both the logo in the middle but also the border all around the outside.
As an alternative if you were to only raster the logo in the middle and instead vector mark the border then the laser head only has to travel back and forth over the logo in the middle which is much less than doing the entire coaster and then the border would be marked much quicker by moving as if you were cutting (vector marking) but because of the lower power it will only mark the surface.
If you want a thicker border you can always use multiple lines close together which will still be quicker than rastering.