Each Zone ID corresponds to the same Zone ID in your PureClarity Admin dashboard. Zones will only display content once you have created and enabled campaigns in the PureClarity admin.
After installation, you must clear the following Magento caches for zones to appear on your frontend:
Layouts
Blocks HTML output
Page Cache
You can clear these caches from the Magento Admin under System > Tools > Cache Management, or via command line: php bin/magento cache:clean layout block_html full_page