The key to turning an idea into reality lies in the execution. Having the inception of an idea and getting it implemented as an application and into the hands of users is an exciting journey and one that constantly develops and evolves between you and your users. One of the great things about developing on the Lightning Platform is the support you get from the platform beyond the core engineering phase of the production process.

In this first chapter, we will use the declarative and Salesforce DX aspects of the platform to quickly build an initial version of an application that we will use throughout this book. This will give you an opportunity to get some hands-on experience with some of the packaging and installation features that are needed to release applications to subscribers. We will also take a look at the facilities available to publish your application through Salesforce AppExchange (equivalent to Apple's App Store), and finally, provide end user support.

We will then use this application as a basis for incrementally releasing new versions of the application throughout the chapters of this book, building on our understanding of enterprise application development. The following topics outline what we will achieve in this chapter:

• Introducing Salesforce DX
• Required organizations
• Introducing the book's sample application
• Package types and benefits
• Creating your first managed package
• Package dependencies and uploading
• Supporting package upgradability 
• Introduction to AppExchange and creating listings
• Installing and testing your package
• Becoming a Salesforce partner and the benefits of doing so
• Licensing
• Supporting your application
• Customer metrics
• Trialforce and Test Drive features