Post Affiliate Pro is truly Web 2.0 web application. It is based on new modern framework (GwtPHP), which cover communication between client (javascript running in browser) and server (php application).
Every piece of data is transmitted between client and server in optimized form and no data are transmitted twice. This means, that using such application is much faster as to use standard Web 1.0 application.
Standard Web 1.0 application reloads whole web page after each click (including menus, header and footer), while Web 2.0 application loads design of web page in one request and later are transmitted just clean data.
It has also next advantages to use Web 2.0 application: Because browser communicates with server using API, you can use same API from your custom application and automate some actions from third party software.

Read more about API in our knowledge base and learn how to manage PAP from external application