Which country's passport is the best for traveling? I mean no need visa to enter, allowed time to stay without visa, etc.
It depends a little on how you measure this, but if you're going on the passport that needs the fewest visas to travel, it's entirely possible to argue that the British Passport ties with the US passport in being able to travel freely to 168 countries or territories.
However, another list claims a higher number for Britain - 173, tied with Finland and Sweden, with the US, Denmark, Germany and Luxembourg in second place with 172.
The trouble with measuring it is that people have different definitions on what defines a 'country' or 'territory'.
Incidentally the second source comes from Movehub's page on this, and they have an infographic on this too.