I suppose that could be euphemistic. Excuse my previous terminology. You do not want to decompress your vertebrae, stretch the quadratus lumborum or the erector spinae to release tightness in the back. You are better off focusing on a bottom up approach with calves, hamstrings, glutes, and rarely directly stretch the areas around the spine.
He means going to a chiro that puts a strap to your head and starts pulling short and hard.
Your spine should decompress slowly with exercises if you want to keep things safe.