The grid formed by 8dp modules, working for aligning of all design elements.
It is used for any type of device — mobile, desktop, and tablet.
The 8dp grid facilities designers’ work decreasing the number of solutions to be done: element sizes and proportions, grid, and margins are all multiplies of 8.
Besides, developers are easy to code created design, being sure the sizes are always the same. Finally, the users take such design better, feeling its aesthetic, harmony, and kept proportions.