WebDeploy is a one-click web app deployment solution for IIS servers. It allows installing and deploying web applications from a development station to a server running IIS. The process involves installing WebDeploy on the IIS server, packaging the web app from the development station, and using WebDeploy to import the package and deploy the app to IIS on the server. While it provides benefits like continuous integration, there are some considerations around its out-of-the-box support primarily being for web sites and requiring IIS configuration permissions on the server.