The plugin can be installed either through the Plugin Store or through Composer.
Open the control panel for your website. Navigate to Settings → Plugins and search for Neo. Click Install.
Run the following command in the root directory of your Craft project:
composer require spicyweb/craft-neo
Neo requires Craft CMS 5.3.0 or later.
Neo supports the same browsers and versions that Craft CMS 5 supports. While Neo may work on browsers outside of those listed, this list is what Neo explicitly supports. The best option is to use an up-to-date major browser.