What is simulation distance in Minecraft?

Minecraft has a ton of settings that can be confusing for those not elbow-deep in knowledge about the game's engine or how it works, and simulation distance is one of them.

The immersive portals mid increased my simulation distance. IDK how? This is good for creative but it makes flying extremely hard in small rooms. And the immersive portals mod isn't working either.

What is 'Simulation Distance' in Minecraft & What to set it to?

Video Settings & Accessibility! ▫ Minecraft Survival Guide (Tutorial) ▫ Caves & Cliffs Update 1.18

Simulation distance – Minecraft Wiki

What is Simulation Distance in Minecraft and How to Change It?

Simulation distance – Minecraft Wiki

Minecraft 1.18 Snapshot 21w38a (Simulation Distance Parity)

How To Change Simulation Distance In Minecraft Bedrock 1.20

Minecraft Java Edition 1.20.2

Minecraft 1.18 Snapshot 21w38a (Simulation Distance Parity)

What is the ideal simulation distance in Minecraft?

What is Simulation Distance in the Minecraft 1.19 update?

Chunk – Minecraft Wiki

Item water streams affected by simulation distance? : r/Minecraft

Minecraft simulation distance