Web can mean several different things:

1. A structure of thin, sticky threads that spiders create to catch insects. Spiders produce silk from their bodies and weave it into intricate patterns, sometimes taking hours to build a single web. Walk through the woods early in the morning and you might see dozens of webs sparkling with dew. Each web is both a home and a trap: when an insect flies into the sticky threads, vibrations alert the spider that dinner has arrived.
2. A complex, interconnected system or network. Scientists talk about a food web to describe how different animals and plants depend on each other for survival: grass feeds rabbits, rabbits feed foxes, and so on, creating a web of relationships. You might also describe a web of lies when someone tells so many untrue stories that they become tangled together, each one supporting the others.
3. Short for the World Wide Web, the system of connected pages and information you access through the internet. When you visit a website or search for something online, you're navigating the web, jumping from page to page through links, much like a spider moving across its silk threads.