What does it mean divide eggs in a recipe?

To divide eggs, crack the egg while holding it over a measuring cup or small bowl. Hold shell so that the white part of the egg drains into the dish while the yellow remains in the half shell. Pour the yellow into the other half shell to allow the remaining white to drain. Do this until the white is separated from the yellow. You can discard the part of the egg you are not going to use, or save it to use as meringue or to add to scrambled eggs. You can refrigerate the part you're saving for up to 2 days.