For Modo user switching to Blender 2.8

It’s depend on your scene units.

Summary
  • If units - millimeters
    mm
    then G + Y + 10 = moving by Y on 10 mm

  • if units - meters
    m
    then G + Y + 10 = moving by Y on 10 m

You need to choose snap from active vertex


if you need to do it in Object mode then look at CAD Transform addon

If you use Inset face(i keymap) by default it inset but with ctrl holding it extrude.

Another tip:
if you have setup your snap settings, you can use it without activation snap icon, by holding ctrl when moving

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