Cordova allows you to use standard web technologies such as HTML5, CSS3, and JavaScript for cross-platform development, avoiding each mobile platforms' native development language.
CordovaorPhoneGap?
PhoneGap is a distribution of Apache Cordova. You can think of Apache Cordova as the engine that powers PhoneGap, similar to how WebKit is the engine that powers Chrome or Safari.
The first argument specifies a hello directory to be generated for your project.
The other two arguments are optional: the com.example.hello argument provides your project with a reverse domain-style identifier, and the HelloWorld provides the application's display text.