Answer by taking a quote from the following article:

Joseph Gilles Henri Villeneuve (French pronunciation:  [Zil vilnoev]; January 18, 1950 - May 8, 1982), known as Gilles Villeneuve, was a Canadian racing driver. Villeneuve spent six years in Grand Prix racing with Ferrari, winning six races and widespread acclaim for his performances. An enthusiast of cars and fast driving from an early age, Villeneuve started his professional career in snowmobile racing in his native province of Quebec.

At the funeral in Berthierville former teammate Jody Scheckter delivered a simple eulogy: "I will miss Gilles for two reasons. First, he was the most genuine man I have ever known. Second, he was the fastest driver in the history of motor racing. But he has not gone. The memory of what he has done, what he achieved, will always be there."  Villeneuve is still remembered at Grand Prix races, especially those in Italy. At the Autodromo Enzo e Dino Ferrari, the venue of the San Marino Grand Prix, a corner was named after him and a Canadian flag is painted on the third slot on the starting grid, from which he started his last race. There is also a bronze bust of him at the entrance to the Ferrari test track at Fiorano. At Zolder the corner where Villeneuve died has been turned into a chicane and named after him.  The racetrack on Notre Dame Island, Montreal, host to the Formula One Canadian Grand Prix, was named Circuit Gilles Villeneuve in his honour at the Canadian Grand Prix of 1982. His homeland has continued to honour him: In Berthierville a museum was opened in 1992 and a lifelike statue stands in a nearby park which was also named in his honour. Villeneuve was inducted into the Canadian Motorsport Hall of Fame at their inaugural induction ceremony at the Four Seasons Hotel, Toronto, Ontario on August 19, 1993. He was also inducted into Canada's Sports Hall of Fame in 1983. In June 1997 Canada issued a postage stamp in his honour.  There is still a huge demand for Villeneuve memorabilia at the race-track shops and several books have been written about him. The number 27, the number of his Ferrari in 1981 and 1982, is still closely associated with him by fans. Jean Alesi, whose aggression and speed in the wet were compared to Villeneuve's, also used the number at Ferrari. Villeneuve's son, Jacques, drove the #27 during his IndyCar and Indianapolis 500 winning season with Team Green, and has also used the number for occasional drives in NASCAR and the Speedcar Series. Canadian driver Andrew Ranger used number 27 in the 2005 and 2006 Champ Car seasons, and continued using the number at NASCAR Canadian Tire Series since 2007. Canadian driver and 2011 IndyCar Rookie of the Year James Hinchcliffe adopted the number 27 for the 2012 season when he joined Andretti Autosport (former Andretti Green Racing).  A film based on the biography by Gerald Donaldson was announced in 2005, to be produced by Capri Films Inc, and with Christian Duguay named as the director, but the film has yet to materialise.

What was his legacy?
Villeneuve is still remembered at Grand Prix races, especially those in Italy.