When you’re at home: Your ISP may offer a Wi-Fi or Ethernet Internet connection. Check with your ISP if you’re not sure which type of access you have.
When you’re at work: You may have a Wi-Fi or Ethernet network connection available. Check with your company’s IT department or network administrator for details about how to connect to your work network, and usage policies.
When you’re on the go: You can use Wi-Fi hotspots (wireless networks that are open to the public) or Instant Hotspot on your Mac (if your Mac and your phone carrier support it). Keep in mind that some Wi-Fi hotspots require that you enter a password, agree to terms of service, or pay a fee to use it.