Most spiders use silk to make webs to trap or drop on prey. Some eggsacs are also made of silk. The mother spider must protect her unborn children in the silken eggsac. Silk is produced by the silk glands and released by the spinners. Next the spider tightens the many hundreds of thinner strands together with spinnerets.
Spiders use silk to raise young, make homes, and hunt prey.
Spinning a web is a very difficult and complex procedure for spiders. First, a spider uses its silk to make a thread of silk between two beams of some kind. Then the spider brings down another string from each end of this support strand, and connects them forming a triangle. Next the spider adds four more triangles. Two of them against the beams, two below them forming a larger triangle by connecting the two bottom triangles.