After you add the project to Unity Hub, open the project and you should see "Unity Version Control" tab at the bottom.
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"Pending Changes" tab shows the changes you made on the project and choose which changes to upload to the cloud.
"Check in Changes" uploads the chosen changes to the cloud and "Undo" removes changes you chose.
You can also add comments to each changes to easily find them on the branch later.
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"Incoming Changes" tab shows the changes from the other organization members.
You can receive changes from other members by clicking on "Update workspace" at the bottom and update your project.
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"Changesets" tab shows history of all the changes you've made on every branches.
Right-clicking on a change set gives you option to revert back to chosen change set or switch your current project to that change set.
Adding comments and version number every time you check-in changes will allow you to fully utilize "Version Control."
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"Branches" tab allows you to add child branches to the main branch and easily switch branches by right-clicking on them.
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You can also click on branch explorer to download Version Control App to your PC and manage your project more easily.
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