Google Calendar API -- Benefits of Client ID vs Service Account

I was wondering if somebody could explain to me the benefits and drawbacks of using Client IDs vs. using a Google Service Account if I want to integrate Google Calendar API into my app.

This video did not explain the benefits/drawbacks very clearly: https://www.youtube.com/watch?v=4lVSLsE7z8U

I also read this post. What's the difference between api key, client id and service account? It says that if I use Client IDs, then the user would be granting the app access to some of his/her Google Account's info.

However, I would like more concrete examples of what I would be able to do/accomplish or not do/accomplish as a developer using Client IDs vs using Google Service Account. In the context of integrating Google Calendar API.

https://stackoverflow.com/questions/65387076/google-calendar-api-benefits-of-client-id-vs-service-account December 21, 2020 at 11:03AM