The biggest threat to a company is how managers treat people, says an exec coach. Here are 3 budget-friendly ways they can get better at their jobs

It makes sense if professional development seems like a nice-to-have because that's how so many of us were raised. But go ask any millennial employee and almost 90% of them will tell you they find career growth and development opportunities important, according to a 2016 Gallup poll. Quite simply put, millennials have shown us all how important it is to grow on the job. So it's a manager's job to get it, and to connect their employees with the right opportunities.

Aria Finger, the dynamic CEO of DoSomething.org, asks her employees thoughtful questions like, "What's important to you? Do you want to become a better speaker? Do you want a byline? Do you want a fellowship?" By tuning into the individual development needs of her employees, they not only feel seen and heard, but they also build critical skills that are both important to the employee and boost the bottom line. Everyone wins through Finger's commitment, including the company. And while not everyone is born "getting it," like I think Finger was, we can all watch and learn how to tune in and offer people on our team meaningful opportunities.

And if you're still on the fence, consider this: LinkedIn's 2018 Workforce Learning Report found that 93% of employees would stay at a company longer if it invested in their careers.

Managers who get it see that (excuse the cheesy pun) left to our own "devices," we just aren't connecting. The days of company happy hours where everyone hangs out are pretty much over. Even if people show up to our scheduled bonding session, so many are in the corner on their phones that relationships aren't built or deepened. Managers who get it know better than to leave connections to chance.

At Zendesk, a successful company that builds customer service software for giants such as Slack, they change up their happy hour by getting their execs behind the bar mixing drinks. Curating connection by "turning the tables" gets employees' attention, and it's a creative way to encourage employees to be present. A law firm I visited invited a reporter to come and interview the top brass to add some content to the experience of getting together.

The now-famous best friend study by Gallup didn't find that being in proximity with others (though that's important, too) boosted productivity at work; instead, people have to feel personally invested in their relationships to thrive.

As another of my heroes, Priya Parker, puts it, when it comes to gathering, "a category is not a purpose." In other words, managers need to keep in mind what they're bringing people together for, and it's definitely not milling around together in the same room. It's genuine connection.

I've seen it with my own eyes: Managers who get it will make the employee experience better, which will make them happy.

All well and good, you may say. Values, professional development, curating connections...but what's the impact on the bottom line? "According to Gallup, the top 10% of companies, ranked by engagement, posted profit gains of 26% through the last recession compared with a 14% skid at comparable employers.

I tell audiences all over the country, from companies big and small, that becoming a human leader isn't rocket science, but that doesn't mean it's easy. But what have you got to lose? Managers who get it bring their human to work, which is good for people, great for business, and just might change the world.

Erica Keswin is the author of Bring Your Human to Work.