Salesforce DX Developer Guide

How Salesforce Developer Experience Changes the Way You Work
Project Setup
Authorization
Scratch Orgs
Development
Build and Release Your App
Develop Second-Generation Packages (Beta)
Second-Generation Packaging
Types of Packaging Projects
Packaging for ISVs
Enterprise Customers
What’s a Package?
Before You Create Second-Generation Packages
Workflow for Second-Generation Packages
Plan Second-Generation Packages
Configure Packages in the sfdx-project.json File
Create a Package
Install a Package
Uninstall a Package
Continuous Integration
Troubleshoot Salesforce DX
Limitations for Salesforce DX
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Types of Packaging Projects

Salesforce offers three methods for building and releasing apps. You can use first-generation managed packages, change sets to deploy metadata via the Metadata API, or second-generation packaging (2GP). With 2GP, you can make your namespace work for you, get finer-grained control over future metadata changes, and implement feature branching during the development cycle.

The type of projects you define are up to you. It all depends on whether you’re an ISV or an enterprise customer and your business goals,