A router is the device that takes your internet connection and shares it between your devices — your PC, phone, laptop, smart TV — and manages the traffic flowing in and out. It's the traffic controller of your home network.
Router vs modem
These are two different jobs that often live in one box:
- A modem connects your home to your internet provider's network (the physical link from the wall or phone line).
- A router takes that one connection and splits it up, giving each device its own access and directing the data.
Many home boxes are a combo unit that does both, which is why people use the words interchangeably.
What a router actually does
- Shares the connection — one internet line, many devices.
- Assigns addresses — it gives each device a local IP address so it can talk to the others.
- Routes traffic — it directs each piece of data to the right device or out to the internet.
- Provides Wi-Fi — most home routers broadcast a wireless network your devices join.
Why it matters for your computer help
A surprising number of 'no internet' and 'slow connection' problems are really the router or its settings — a reboot fixes more than most people expect, and the router is where you change the Wi-Fi name, the password and the security.
If your internet is acting up, the router is the first box to restart (unplug for 30 seconds) and the first place to look for settings that affect the whole household.