Currently passport holders of 62 countries including Americans, Canadians and Australians can visit the EU visa-free for 90 days. This is about to change in 2021. The European Union announced that a new electronic travel authorization (ETIAS) for visiting in the Schengen Zone will be required.
The authorization will cost 7€ and will be valid for 3 years or less, if the expiration of the passport is shorter at the time of the application.
The new requirement is will be an extra step and expected to cause extra effort and time to visit or transit through the EU.