In this Unreal Engine 5 tutorial, we dive deep into the Actor Position material node! Learn how to extract world space coordinates in real-time and leverage them for dynamic shader effects, texture blending, particle systems, and movement-based vertex animation. 
https://dev.epicgames.com/community/learning/tutorials/YDloq/unreal-engine-mastering-the-actor-position-material-node-in-ue5-complete-material-node-guide
Community Tutorial: Mastering the Actor Position Material Node in UE5 | Complete Material Node Guide
Thank you for sharing this guide. For readers who are new to the node, it may help to remember the main difference from Absolute World Position. Actor Position returns one world-space location for the whole actor, so every pixel and vertex of that actor receives the same value. Absolute World Position changes across the surface of the mesh.
This is why Actor Position suits effects that should vary from actor to actor, such as a small colour or roughness variation between copies of the same prop, or an offset that gives each copy of a swaying object a different phase. Feeding the value into a noise or a frac function is a common way to turn it into a stable random number for each actor.
It is also worth testing the result on the platforms you ship to, because material complexity can grow quickly when several of these variations are combined.