SHIFT + Button5 Mouse
Remap this accordingly, depending on your Mouse and personal preferences.
The Snapping Pie provides access to commonly used snap settings.
The pie buttons in the lower half, are presets. Surface snapping for instance, is face snapping with Align Rotation to Target enabled. Vert and Edge snapping however, will disable Align Rotation to Target.
by default only the Vert, Edge and Face presets are exposed
the pie can be switched to a second layout, that also offers the Grid preset
The Grid preset toggle is for convenince exposed in the pie itself in the top right corner.
Its actaully a setting in the addon preference, though, and so to permanently enable it, you need to save your preferences.