On thepage you'll notice there are three columns: Commits, Staging, and Production. These columns contain your builds available to be deployed as well as any successful deployments.
Builds is a list of all the builds that Truffle Teams is processing or has processed. Each will have a status icon to show if the build is in progress, failed, or successful. Builds with a successful icon (a green box with a checkmark, as pictured) will be able to be deployed; thebutton in the top right of the commit indicates this.
Staging contains a list of all testnet (i.e. Ropsten, Görli, Rinkeby, and Kovan) and sandbox deployments. Production contains a list of Mainnet deployments.