Here we go to create your first or very simple module in magento2. We are going to create module with Namespace is "Jwd" and Module Name is "WelcomeWorld". Step1: Create a module.xml file in app/code/Jwd/WelcomeWorld/etc/module.xml [sourcecode language="plain"] <?xml version="1.0"?> <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../../../../../lib/internal/Magento/Framework/Module/etc/module.xsd"> <module name="Jwd_WelcomeWorld" setup_version="1.0.0"> </module> </config> [/sourcecode]   Step2: Create app/code/Jwd/WelcomeWorld/registration.php [php] <?php \Magento\Framework\Component\ComponentRegistrar::register( \Magento\Framework\Component\ComponentRegistrar::MODULE, 'Jwd_WelcomeWorld', __DIR__ ); ?> [/php]   Step3: Create a frontend router in app/code/Jwd/WelcomeWorld/etc/frontend/routes.xml [sourcecode language="plain"] <?xml version="1.0"?> <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:App/etc/routes.xsd"> <router id="standard"> <route id="welcomeworld" frontName="welcomeworld"> <module name="Jwd_WelcomeWorld"/> </route> </router> </config> [/sourcecode]   Step4: Create the file index.php for controller action in app/code/Jwd/WelcomeWorld/Controller/Index. This will map to http://127.0.0.1/magento2/welcomeworld/index/index welcomeworld: front name index: name of controller folder index: name of action file – index.php Each action is its own class extending \Magento\Framework\App\Action\Action. In every action file,…