Wizzy search magento 2 module can be installed following ways.
composer require wizzy/search-magento-2
Once the module is installed through composer execute following commands to enable it on Magento store.
php bin/magento module:enable Wizzy_Search php bin/magento setup:upgrade php bin/magento setup:static-content:deploy
Visit Magento Marketplace to install the module, follow the instructions on marketplace for installation guide.
Once you’ve the module installed in your Magento environment, You will need to go through each step from documentation in the following order to get it up and running.