From version 2.5 onwards, Page Builder by SiteOrigin introduces an awesome new feature, copy/paste widgets.
To see it in action, go to any page or post using Page Builder, right click on a widget to bring up the contextual menu, locate and click the Copy Widget link under the Widget Actions heading. To paste the widget, go to any Page Builder row either on the same page or on a new Page Builder page, right click to bring up the contextual menu and click Paste Widget under the Cell Actions heading.
If you’re using Page Builder by SiteOrigin and haven’t had a chance to check out this awesome new feature, give it a try.