When you open the extension, paste the widget ID in the first field.

In the second field, type the URLs of all pages where you want to launch triggers. To target multiple URLs, separate them by commas.

* is a wildcard character. Use it to select on which pages the content should display. Like this:

https://stonly.com will only target the stonly.com homepage.
https://stonly.com* will target stonly.com and all of its sub-pages. For example, stonly.com/pricing.
https://*.stonly.com will target only the subdomains of stonly.com. For example, app.stonly.com.

Adding Stonly extension in Chrome