PCL libraries are a great step forward in code reuse. They can be used for a large number of situations and aid in rapid application development. They are simpler to debug than having the same code in every version of the application. Overall, it helps in application construction.

When it comes to Xamarin.Forms applications, the core is a PCL. This is then fed to the platform-specific code.

In the next chapter, we will take a closer look at the database helper class and how to get the best from it.