The employee participation rate gauges the reliability of your survey results. The score itself is a key measure of employee engagement. It indicates employees' willingness to share their opinion and feelings toward your company. A low participation rate indicates a warning signal on talent attrition. Non-respondents having a 2.7x higher likelihood of leaving the company within 6 months.
So, the higher the participation rate, the better. But the truth is, HR leaders spend hours and a lot of energy and resources on employee surveys to get very low participation scores at the end.