You can find and sign up for Cooki at cookihq.com.
Creating your notification banner
Once you have created a Cooki account, you can start by creating your first notification banner.
Click Notifications and then "Add A Notification". You'll see a standard banner appear that looks like this:
From here, you can click "Edit" to update your settings.
In "General Settings" you can select the option to only show for European customers, update the background colour, and select the banner's orientation (top or bottom of page) and padding.
Clicking "Description Options" will allow you to update the description text.
Finally, clicking "Accept Button Options", "Decline Button Options", and "Info Button Options" will allow you to change each button as well as allowing you to hide the More Info button from the banner.
Installing the Cooki banner
To use Cooki on BigCommerce, WooCommerce, or another site like a blog or marketing site simply copy the text in the box at the bottom of the edit page and paste it into your website's HTML. Any page that contains the pasted script tag will display the banner.
To uninstall a manually added script from your store, simply remove the pasted script tag from the liquid files you added it to. The script tag can mostly commonly be found in the head or just before the closing body tag.