Every day we get new reminders of just how tough the war for talent can be. It isn’t enough to attract the greatest employees — you have to retain them. That’s become a bigger challenge with “job hopping” on the rise. One survey found that 64% of workers, and 75% of those under the age of 34, believe frequently switching jobs will benefit their careers.

Why, then, would I actively encourage even my best employees to pursue outside job offers? The answer is simple, if counterintuitive: It helps the business succeed.

In my last job, as senior director at HubSpot, and now as CMO of G2 Crowd, I’ve not only encouraged my employees to look elsewhere but also told them that I keep an eye out for potential new jobs for myself as well. Ironically, all this helps me win — and quite often keep — terrific employees. Here’s why.