Within a site you define versions, only one of which is publicly active at a time, to allowing for staging of updates.
Application users (members) are managed at the Site level and are shared between versions.
Within a site version you define end points that map to a url (including wildcards), that are executed when the url (e.g. https://myapp.cloudgluesite.com/this/is/a/url) is requested by a client.
An end point can serve a page template from the active theme for the site version, and/or execute code that implements your workflow.
To connect to with other cloud services you enable and configure integrations.
Read about the console where you define and manage sites, or jump directly to a specific section: