Unless you have a Wi-Fi base station such as the AirPort Express by Apple which can convert the wired Internet connection to wireless access point, one way to share the Internet connection for free is through the unused wireless adapter found on your laptop. However some places such as hotels only provides wired Internet connection via Ethernet and only your laptop can get connected but not your smartphone. There are times when you have a few Internet capable devices such as your laptop and smartphone that needs to connect to the Internet.
