Why do spiders build webs?

Spiders build webs primarily to catch prey. Their silk, produced by spinnerets, is strong and sticky, making it an effective trap for insects. Webs also serve as a safe place for spiders to rest, lay eggs, and protect themselves from predators. Some spiders use their webs for communication or to store food. Web-building is an energy-efficient hunting strategy, allowing spiders to capture food without actively pursuing it.