This repository contains the source of the Code Smell Catalog website that contains the current list of smells along with their:
New developers can browse the code smell list in a nice, readable form of articles and read about them to get a good intuition of what might be a bad practice or what they should watch out for.
They can find the descriptions of smells, their potential causation example, and table-formatted, higher-abstraction attributes about the particular code smell (like whether it is a smell that happens within a class or between classes). On top of that - the majority of code smells have examples that are often very significant when one is learning about a new thing.
It's much easier to handle a code review discussion when someone can place a link directly to the source of his concerns. This could benefit and accelerate the understanding of code smell among developers.
A large proportion of developers may even intuitively know about most of these things without knowing about the issue itself as a named phenomenon. This, again, can improve the overall skills of developers.