Now that we have had a look at a theoretical introduction to extensions, it is time to take a look at some of the most important extensions. In this section, you will learn about modules that are provided to you as part of the PostgreSQL contrib module. When you install PostgreSQL, I recommend that you always install these contrib modules as they contain vital extensions that can really make your life easier.
In the upcoming section, you will be guided through some of the ones I find the most interesting and most useful for various reasons (for debugging, performance tuning, and so on).
