The antenna should have come with a coax cable that gets connected to the coax connector on your TV. The antenna also likely came with a power supply that needs to be plugged into the antenna.
Once connected, you'll need to scan for channels on the TV itself.
The antenna didn't come with instructions but your TV did. Check the manual.
If the antenna is directional you will need to aim it toward the TV transmitter tower or towers. Every time you reorient the antenna you have to scan again to see if you find any other channels.