In a client-side implementation of Adobe Target, Target delivers the experiences associated with an activity directly to the client browser. The browser decides which experience to display and displays it. With a client-side implementation, you can use a WYSIWYG editor, the Visual Experience Composer (VEC), or a non-visual interface, the Form-based Experience Composer, to create your activity and personalization experiences.
Adobe Experience Platform Web SDK: The Adobe Experience Platform Web SDK lets you interact with the various services in the Experience Cloud (including Target) through the Adobe Experience Edge Network. If you choose to migrate to the Adobe Experience Platform Web SDK, see What is Adobe Experience Platform Web SDK in the Web SDK Guide.
Although, mbox.js is currently supported (until March 31, 2021), we have not provided feature updates to this library since July 2017. By moving all customers to the Adobe Experience Platform Web SDK or at.js, our engineers and support staff will be able to provide you with new functionality and offer the support you have come to expect from Adobe.