Celery for WordPress is a WordPress plugin to seamlessly integrate the Celery preorder platform into your WordPress posts and pages.
To install Celery for WordPress:
Plugins > Add New.
Note: Celery for WordPress is compatible with multisite mode. If you are running in multisite mode, we recommend that you do not Network Activate the plugin unless it really does apply to all sites. Each site will have its own configuration settings.
If you prefer, you can also download the plugin zip file here and install it manually by uploading it.