IIS stands for Internet Information Services (formerly Internet Information Server) and it represents a web server application developed by Microsoft.
In order to improve its features and add extra functionality to ISS, users can install third-party add-ons.
Some of them can be used to boost the speed of all managed websites or to deal with reliable cache management for developers
One will also be able to password protect web site content with needing to set up any additional user accounts or to generate a wide range of reports.