Each file in this repo contains recommendation settings for the TGM Plugin Activation code
http://tgmpluginactivation.com/
You will need one file out of the TGM folder from the site above or from https://github.com/TGMPA/TGM-Plugin-Activation.
You are looking for the file class-tgm-plugin-activation.php
In your theme or plugin or code location you need to first require this file
require_once dirname(__FILE__) . '/class-tgm-plugin-activation.php';
Then grab one of the function files listed in this repo and hook it into a specific action hook (that is defined in the above Class we just required.
add_action( 'tgmpa_register', 'itt_custom_suggested_plugin_suite' );
For more information, this was demonstrated during the 15th WordPress Developer Course at https://training.ithemes.com