Wall anchors are devices used to secure objects to walls, especially when the wall material is not strong enough to hold screws alone. They provide extra support by distributing the weight of the object over a larger area, preventing it from pulling out of the wall. There are various types of wall anchors, including toggle bolts, plastic anchors, and metal anchors. Each type is designed for specific wall materials, such as drywall or concrete, and can hold different weights. Proper installation is essential to ensure that the anchor functions effectively and safely.