Mac Pro, Mac Mini, iMac, MacBook, MacBook Pro, iPad, Displays
How to Exclude Items from Spotlight Search
Exclude anything you don’t want indexed (saves time and annoyance).
See Optimizing Spotlight.
The last thing I want is for Spotlight (“mds”) to interfere with my work by indexing my fast Scratch volume, my Time Machine backup slowed to a crawl, etc. Exclude such things.