The Champs-Élysées hosts France's major public New Year's Eve gathering in Paris.
The broad avenue runs from the Place de la Concorde toward the Arc de Triomphe and is a traditional gathering place for people welcoming the new year. Crowds often assemble along the avenue and nearby areas, while the Arc de Triomphe provides the central visual focus for official projections or displays.
Paris New Year's Eve celebrations have changed over time, and the exact program can differ from year to year. Some years emphasize video mapping or other light displays rather than conventional fireworks at the Arc de Triomphe. The Eiffel Tower is also illuminated during major celebrations, but it is not the avenue named in this question.
The Champs-Élysées is therefore best understood as a public gathering corridor, not a single permanent stage or an annually identical fireworks venue.