A Lattice point is the position in the unit cell or in a crystal where the probability of finding an atom or an ion is the highest. In other words, the atoms or ions occupy the lattice points in a crystalline solid.
The lattice positions occupied by the constituent particles are shown as points in the open structure of the unit cell.
The lattice point may be found to be vacant in certain cases. Example: Point defects.
Read more about the number of lattice points in a unit cell.