How can HR use SM as an effective communication tool?

How can you use crowdsourcing in HR?  

What ideas would you bring to your job from SM? 

Do you see any potential for using this type of SM outside of a job?  
 https://www.forbes.com/sites/forbescommunicationscouncil/2020/01/07/why-leveraging-social-media-as-a-customer-care-channel-makes-business-sense/#666aad38266d