Netting generally is any fabric woven as a square mesh that is knotted at each corner for stability. The beauty and longevity of this material is that it can be easily mended, invisibly and in as small a section as required.
The image of fishermen sitting close to the shore mending their nets is an old one.
The same construction method creates many open weave fabrics that can be used for curtaining and blinds; it’s also the method used by lace makers to make the ground, the reseal, separately on which to apply pattern, or integrated with.