A Pergola is a great way to spruce up a traditional patio. In home improvement, a pergola has come to mean an outdoor patio structure formed of horizontal trelliswork supported on columns or posts. Pergolas minimize harsh sunlight and heat, yet allow plenty of light and breezes. It is also the ideal environment for growing vine plants. Benefits Of A Pergola It won't deteriorate or rot. It is resistant to weather exposure. It won't need yearly maintenance. It won't become infested with insects. It has more strength than roll-formed aluminum, wood or vinyl products.