Tile?
Different material 'tile' can call for different bit types.
Also depends on hole size, and quantity, and 'quality' of cut. And also whether the hole is round or not.
Tools can vary from a diamond tipped hole saw, to a carbide grit jig saw blade, to a carbide grit hack saw blade, to a diamond grit 'burr' in a rotary tool (RotoZip, kind of a bigger Dremel with a bigger more powerful motor and a bigger shank diameter on the bits) to a diamond tipped cut off wheel in an angle grinder, to a diamond tipped coring bit in a wet drill tile hole tool, to a whatever.