What does "by far" mean?

Native speaker’s answer
Rebecca
"By far" is an expression that means "by a great amount/by a long way" and is used to contrast two things, often a period of time or competing objects. In this case, it is used to say that compared to previous seasons, this season is the most ambitious by a great amount (much more ambitious than before). Ex: By far, this is the best cake I've ever had. Ex: This is the best vacation I've had, by far.