Depends on what they are consulting on. I know that places I've worked have had management consultants, who came in, worked with our teams for a few sessions,

Depends on what they are consulting on. I know that places I've worked have had management consultants, who came in, worked with our teams for a few sessions, and wrote us up some recommendations as to how we could better work together. We also hired DB Performance consultants, who came in and helped us optimize some gnarly queries and do a DB "Double check" to verify that the path we were on was good. Another time we hired a pricing consultant, who helped us come up with a strategy to change our pricing and avoid pitfalls. Basically, They are subject matter experts who may come in and actually be on-demand teachers in my experience.