Although eNPS is undoubtedly useful, it is not without limitations. It’s great at measuring how likely employees are to recommend your company as a place to work. It doesn't tell you much else.
While some companies use eNPS scores as shorthand for employee engagement generally, doing so doesn’t provide a clear view of the full, nuanced engagement landscape.
For example, it is possible for an employee to be a Promoter in the eNPS sense without being meaningfully engaged at work. Consider the diverse reasons why an employee may recommend a place to work: Perhaps their company provides excellent remuneration. Perhaps it provides a high degree of stability. Perhaps it allows flexible hours that suits the employee’s lifestyle outside of work.
These criteria certainly reflect positively on an employer and they may justify a recommendation on their own. However, an employee that makes a recommendation based on these criteria may not feel as positively about other aspects of their work life. After all, being well remunerated or enjoying flexible hours is not the same as being motivated at work, feeling a strong commitment to the company’s future, having development opportunities or being meaningfully engaged as an individual.
Without asking other questions, there’s no way to gauge these other engagement indicators using eNPS alone.