GitHub deployments help display a history of your deployments. They don’t perform the actual deployments (Vercel does), but simply keep a trace of it.
Next Right Now integrates GitHub Deployments since v5.0.7 (January 2021) to help keep track of what deployments are sent to Vercel.
They are not meant to replace the Vercel dashboard, but to complementary.
At Unly, they’re useful to our Customer Success and Support teams, so they can keep track of a customer’s deployment history without developers’ assistance.
For Next Right Now, they’re useful to visitor looking for the deployment history of a demo customer, because they don’t have access to the Vercel deployment history.