Introduction
Application Pools in VMware Horizon pool allows administrator to provides access to applications hosted on servers in a data center instead of users personal computers or devices. Using application pools you can deliver a single application hosted on a farm of RDS hosts. Once deployed, entitled users can access the application from anywhere on the network. Application deployed using Application pools supports both PCoIP and VMware Blast display protocols.
Before application pool deployment, application servers where application will be hosted is required to be Remote Desktop Session Host Role installed and applications are installed on the application server.
Creating Application Pool Step by Step
Prerequisites
- Set up RDS hosts.
- Create a farm that contains the RDS hosts. See Creating Farms.
Post creating Farm containing RDS Host, Click on Application Pools under Catalog. Click on Add to create a new Application pool.
Select the RDS farm having the RDS host where applications are installed. You will see the list of hosted applications in RDS farm. Select the applications you want to be accessible to the users. Click Next to proceed.
Click on Finish. Choose “Entitle users after this wizard finishes” if you want to entitle applications to the users immediately after Farm creation. You can entitle the applications at later stage as well. 
Users can see the entitled applications in the list post connecting using VMware Horizon Client.
Summary
Application pool makes the application deployment process very easy. Instead of deploying applications individually on each user desktops, you can now deploy the application only once and make accessible to the many users. I hope this will be informative for you. Thanks for Reading. Do share it on social media if you find it worth sharing. Happy Learning :-).