The naming convention of the downloaded package is as <namespace_modulenameversion.zip>.
For Example, ced_csggroup-0.0.1_5.zip.

Prerequisites
Here are some prerequisites that the user has to verify before installation:

• Magento Version Community Edition 2.0 is already installed.
• In case of any dependency on any extension, the relevant extension should be
  already installed.
  
  

To Add the Module to the Magento 2 Directory:

1. Extract the downloaded package <namespace_modulename-version.zip>.
   Note: After extracting the compressed file, check whether the available folder is /app or <ModuleName>.
   If the available folder is /app, then go to step 1- a. If the available folder is <ModuleName>, then go to step 1- b.
   
   1. Copy the /app folder from the provided package and paste it to the <Magento 2 Folder>.
      OR
   2. Copy the folder <ModuleName> from the provided package and paste it to the <Magento 2 Folder>/app/code/Ced.
      Note: Create the required folder structure in the system if it does not exist.
      
      
2. Open the terminal (cmd) and do the following steps:
   1. Change the directory to Magento 2 root directory using the cd command.
   2. Run the command: php bin\magento setup:upgrade
      Note: Only after completion of Step 2- b, follow the step 2-c:
   3. Run the command: php bin\magento setup:static-content:deploy
      Note: Only after completion of Step 2- c, follow the step 2-d:
   4. Run the command: php bin/magento setup:di:compile
      Note: If php is not accessible globally then replace php with a complete path of php.
3. Go to the Admin panel of the store, and first clear the Magento 2 cache.