HR mainly does admin (pay, leaves, etc) and advises management on how to avoid employment-related lawsuits, they also advise on employment market trends (e.g. '

HR mainly does admin (pay, leaves, etc) and advises management on how to avoid employment-related lawsuits, they also advise on employment market trends (e.g. 'this is what the industry pays for this sort of job so if we want to attract people we need to adjust accordingly').