Plus codes are based on latitude and longitude – the grid that can be used to describe every point on the planet. By using a simpler code system, they end up much shorter and easier to use than traditional global coordinates.
A plus code in its full length is 10 characters long, with a plus sign before the last two. It consists of two parts:
Each code uses these two parts to locate a larger region and then find the precise location within that region.
If the location is within or near a town, the area code isn't needed. In rural locations, even if the nearest town is up to 25 kilometers away, the area code isn't needed. You can use the local code together with the name of the town.
For those needing more precision, an additional, optional character can be used to improve accuracy to roughly 3 x 3 meters – about the size of a small car.