Pixel grids let you create pixel-perfect vector shapes, position them, and align the shapes and individual paths precisely at the pixel level. The entire artboard is automatically divided into pixel-level grids.
When you zoom the artboard to a ratio of more than 1000%, you can see all the pixel grids clearly.
Each pixel grid is 1px in width and height. It cannot be selected, and its properties cannot be changed.
While drawing or resizing vector shapes with the Pen tool, the pixel grid provides 9 auto-alignment anchor points that enable you to align or position your paths or shape them quickly using clicks.