Auto Z-Fixer is a productivity tool for Unreal Engine designed to instantly resolve "Z-Fighting" (flickering textures caused by overlapping geometry). Unlike complex material shaders that impact performance, this tool physically offsets selected actors by microscopic amounts to force the depth buffer to render them correctly.
Another smart use of this tool is to scatter a large number of actors. By applying larger offset values, you can instantly break up the uniformity of perfectly aligned assets (such as fences, debris, or crowds) to add natural variation and realism to your scene in seconds.