What are real use-cases right now for custom models and model training for big corporations that have real business value? [R]

I hope this subreddit is the correct subreddit for my question. I'm a data engineer and cloud architect that is currently being tasked with providing a all-in-one solution for ML workloads. Now the thing is these guys didn't show me what they actually want to do with this (i know i know dubious motivation for a project but here we are). I always have been interested in ML though and really want to understand what they are doing there and what use-cases a