How we activate the wp bakri page builder
Please go to your Downloads page (www.themeforest.net/downloads), click download, choose “License certificate & purchase code (PDF)” and you will find your purchase code in that PDF.
please check this article:
Note: If you got the page builder as a theme bundle plugin then no need to active license.
Theme Bundled plugins do not have their own licenses. This means they cannot be activated for updates.
All bundled plugins update responsibility is the theme’s author. So you can safely ignore any plugin activation messages. Just always download the theme latest version to get latest update plugins.
You can check this Help article:
You don’t need to activate it.
If WPBakery Page Builder is included into a theme that you’ve purchased, you can’t update/activate this plugin if you don’t have license for WPBakery. This mean, you need to buy a license for WPBakery plugin.
Of course, WPBakery and other plugins (if there are more of them, like Slider Revolution) will work fine and you don’t need to buy additional license.
But, when there is a new version of WPBakery, you can’t update it until the theme author does not update the theme and version of WPBakery which is included in theme.
On other side, you can buy license for WPBakery (to activate it) and to have the latest version (easy update - no wait for theme author update) but that also can be a problem - what if the latest version of WPBakery is not compatible with your theme? In that case, you still need to wait until the author update the theme.