To set a popup for display on all your pages, you just have to set 1 URL rule
1.
 Log in to your account
2. Create a popup or edit one that already exists
3. Go on the “Display rules” tab
4. Look for the “Where to display” section
5. Create the following URL rule: “Show on url” + “Beginning with” and just type the domain name, like “website.com” (no need to type http, https, www, http://www…)
6. Save

Now your popup will be displayed on every page where the URL begins with “website.com”, which means all your domain pages.

It is worth noting that if you set other “display rules” conditions, your popup will not be displayed if these conditions are not met, even if your URL rules allow your popup to be displayed on the current page visited.