The Wind in the Willows is written in third person, with no specific character narrating. Instead, we are treated to the many feelings and emotions of each animal as they are introduced. The third-person omniscient point of view allows readers to participate in the story as an impartial audience. This choice allows readers to fully appreciate the humor and the wit of the story.
For example, the passage when Badger arrives at Mole and Water Rat's house is described as follows: "This was a wonderful thing, indeed, that the Badger should pay a call on them, or indeed on anybody. He generally had to be caught, if you wanted him badly..." By offering this piece of background information, the third-person omniscient narrator allows us to understand how truly desperate Badger is to rectify what he sees as a travesty (namely, Mr. Toad's automobile).
So how does this point of view affect the plot? Well, one of the benefits of this third person perspective is that we can see all characters at any time, understand their feelings, and follow their adventures. Thus, the story can skip from one character to another as the plot develops. This is important, as The Wind in the Willows has many amusing characters, each of whom gets some time in the spotlight.