In the most general terms, a web application is software that runs on a web server. A web server is a designated computer set up to host webpages. When installed, web applications create an environment that allow users to build websites.
The applications you install will determine what kind of website you will ultimately build. We have separate documentation for different applications, including WordPress, Scalar, and Omeka.
Most web applications are comprised of two components: files and a database. When you install a web application, you will need to make sure all of the files are copied over into the appropriate location AND that a database (and database user) has been set up to connect to those files. Often, you will have to do some configuration to make sure the application knows how to access the database.
The system we use for digital.brynmawr.edu uses a special script installer called Installatron (in cPanel) that allows you to automatically install dozens of open source applications. When you use Installatron, you don’t need to worry about moving files, creating databases, or doing the initial configuration. It’s all taken care of for you.