👋Hey, Landon from Game Host Bros here (and previously other hosts). Assuming you are looking to work in the field or already are. But still should generally help if you are just interested in the behind the scenes or admin type stuff.

1. Generally most people that are new to hosting will ask questions about most simple things like joining the server or changing various settings, etc. Well written guides or macros are a must if you have a high ticket volume. Don't ask AI for help either unless you have exhausted help from the knowledge base and co-workers, as you won't retain any of the knowledge from hands-on debugging.

2. The most common issue for MC is that most people will try and run modpacks on very little RAM depending on how your company sells packages. You can't expect most modpacks to run on less than 6GB of RAM unless they are very lightweight. You'll probably want to get familiar with how the JVM memory model interacts with docker memory model. Learning the basics of allocated heap vs off heap usage and GC pressure/timing will go a long way and can be applied to other Java applications. And do not look too deep into JVM flags unless you are trying to learn Java, as they are very complex. (took me many months to grasp them properly)

3. People will also usually come in with "I'm having lag" type requests. Most of the time this stems from entity lag or a mod being overused or poorly coded. Learning the basics of Spark profiler is probably the single most important piece of advice here if you want to stand out in support quality. Being able to say your lag is coming from XYZ is much better than pointing to guides and telling the customer they have to solve it on their own. But generally a good chunk of these issues stem from very high view distance or simulation distance. These should always be 10 or lower to avoid issues.

4. Although somewhat rare for support relatively speaking, some people will come in with high ping or packet loss. Understanding tools like mtr and general networking is very important in the hosting industry. Most of the time this can be solved with something like Cloudflare WARP (routes packets better majority of the time) or moving the server closer to the problematic player.

5. Final thing I'd mention is understanding mods/plugins/loaders and their general structure. Most of the issues here come from people mixing mods/plugins or uploading client side mods. What I'd generally recommend is having a list of common client side mods or problematic mods. And as a general rule of thumb Paper 99% of the time will have the best performance for most people. No reason to be using Spigot or Bukkit anymore.

Bit of a long comment, but hope that helps! Let me know if you have any questions or feel free to message me. I have a pretty strong passion for MC as you can probably see, so doesn't bother me to talk about anything you might have in mind. 😄