Employee engagement: It's a term we all use, but the definition can be kind of hazy. There is good reason for this — namely, what is good for one company may be a detriment to another. Engagement also varies from employee to employee, both in terms of what gets them engaged and in how their engagement manifests. The cranky sales guy who vigorously debates your new policies may be more engaged than the person who complies with everything but seethes silently.
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Source: Recruiter