In this case, it serves as a holding framing.

The border made of granite or other material is an element of paving roads, and is one of the most important. It can be used to separate public transport stops, lawns, sidewalks, parking lots, artificial ponds, fountains, garden paths, etc. In addition, it is used during laying granite or paving slabs, paving stones, different types of road surface. In this case, it serves as a holding framing. A granite border or natural stone is often used as an element of decor.