riechsteinertech MGSpaceCaptain: I found some of these descriptions below from Reddit.
1) Microsoft Teams are biweekly or monthly production builds published from Microsoft.TeamsPreview, and are currently on Electron version 8.5.5.
2) Microsoft Teams Preview are weekly or biweekly preview builds published from Microsoft.TeamsContinuousDeployment, and are currently on Electron version 8.5.5.
3) Microsoft Teams Continuous Deployment are daily builds, and are ahead of the Beta Channel, and are currently on Electron version 10.4.3.
4) Microsoft Teams Exploration are experimental builds, and are ahead of the Beta Channel, and are currently on Electron version 10.4.5.
A lot of these versions can be downloaded from https://raw.githubusercontent.com/ItzLevvie/MicrosoftTeams-msinternal/master/defconfig and https://raw.githubusercontent.com/ItzLevvie/MicrosoftTeams-msinternal/master/defconfig2.
TomRBerg: I think Microsoft Teams Exploration has nothing to do with "Microsoft Teams Exploratory".