LinkedIn business pages vs business manager

My manager has me running a PPC LinkedIn ad campaign, which I'm teaching myself how to do as I go.

I've also been signed up for LinkedIn business manager, which appears to be a tool for keeping all your LI business pages on one dashboard?

For context, we're a small financial services group with ~20 employees, split across three hubs which each have a LI page.

Question: Is it worth using business manager at that scale to run the campaign? Or should I stick with the three (in practice more like two) individual pages?

Huge thanks in advance for any advice.