Server optimization is a multiplayer setup built around stable TPS and low-lag interaction, even when the server is busy. The point is consistency: hits register, knockback behaves, blocks place and break on time, and movement does not turn into rubberbanding during fights, raids, or packed spawn areas.
Most optimized servers achieve that by reducing needless work per tick and controlling the biggest performance sinks. The cost is that some borderline mechanics stop being dependable. Huge entity farms run into tighter caps, villagers get managed more aggressively, and high-frequency redstone or hopper spam may be throttled or limited if it drags the whole world down.
The playstyle it creates favors efficient engineering over brute force. Farms still exist, but the best ones keep entity counts sane, avoid permanent chunk activity, and spread processing out instead of spiking it. Socially, that usually means clear expectations: if a contraption causes lag, you will be asked to fix it, relocate it away from hubs, or redesign it so everyone keeps a clean experience.
