How To Set a Popup (Weblayer) Not to Pop on a Certain Page

On Flashy you can set a popup not to be activated on a certain page.

Enter "AUDIENCES & RULES", then click "ADVANCED FILTERS"

You can set the popup to be activated only if the URL of the page the visitor is on does not contain a certain string (such as "checkout" for instance).

Setting a Popup (Weblayer) Not to Pop on Several Particular Pages

If you want to add more pages on which the popup will not pop, you can click "Add new filter" and add the additional URLs in the same way. 

Please note, you will have to select "Match all filters" – so that the popup will be activated only if the URL does not contain X and Y, and Z.