Connecting your TV or Smart TV to the internet is relevantly straightforward. Like computers, they need a wired or wireless internet connection.
Wired internet connection:
Look at the back of your TV for an Ethernet port, similar to the one shown below.
Plug an Ethernet cable into your router and then into the back of your TV
If no options come up manually, go into your TV's menu/setup and find the networking settings. From here, you'll need to enable wired internet and if applicable enter any passwords associated with your router...." blah, blah..