Before a session, the coach needs to know where you're at and where you wanna get to, in order to tailor the coaching approach. Expect questions about your hero pool, playstyle, whether solo or duo lane gives you more trouble, your rank, and the situations you keep losing.
In the session itself, you join over Discord while they review your gameplay: laning and soul economy, fight positioning, when you rotate, how you read objective timings, and all that Deadlock stuff. You leave with personalized feedback, an adjusted item build, and a short list of specific habits to change.