Zephyr's west meta tool can perform a vast number of useful operations. Here's a collection of both command and uncomon commands that we find ourselves reaching for when working on Zephyr-based IoT projects.
Zephyr's west manifest system includes an allow-list to filter dependencies from upstream libraries (like the Zephyr tree itself). Use it to tightly control what libraries your projects use, and to stop checking out way too many unused code.
Zephyr (west) manifest files allow the user to specify where and when dependencies are included into a project. Doing so allows cleaner project repositories and more precise control over when and how a project will be updated down the line.