Install the Magento® 2 extension through Composer:

Magento® 2 use the Composer to manage the module package and the library.
Composer is a dependency manager for PHP. Composer declare the libraries your project depends on and it will manage (install/update) them for you.

Check if your server has composer installed by running the following command:
composer –v

If your server doesn’t have composer installed, you can easily install it by using this manual:

Step-by-step actions and commands:

1. Create a folder in you Magento Root Directory.
For example; /var/packages/magmodules

2. Add this as an artifact repository to your composer.json;

"repositories": [
  "type": "composer",
  "url": ""
  "type": "artifact",
  "url": "var/packages/magmodules"

3. Upload the (unzipped) zip-zile to this directory. 

4. Run the Magento® upgrade and clean the caches:
php bin/magento setup:upgrade
php bin/magento cache:flush

5. If Magento® is running in production mode you also need to redeploy the static content:
php bin/magento setup:static-content:deploy

After the installation: Go to your Magento® admin portal and open ‘Stores’ > ‘Configuration’ > ‘Magmodules’ .