Understand lightning component in Salesforce lightning
The Lightning Component framework is a UI framework for developing single page applications for mobile and desktop devices.
-The Lightning Component framework is a UI framework for developing dynamic web apps for mobile and desktop devices
-Modern framework for building single-page applications with dynamic, responsive user interfaces for Salesforce.com apps
-Components are the self-contained and reusable units of an app
-The framework supports partitioned multi-tier component development that bridges the client and server
-It uses JavaScript on the client side and Apex on the server side
Create Aura Components in the Developer Console
The Developer Console is a convenient, built-in tool you can use to create new and edit existing Aura components and other bundles.
-Open the Developer Console.
-Select Developer Console from the Your Name or the quick access menu
-Open the New Lightning Bundle panel for an Aura component
-Select File | New | Lightning Component
-Name the component