The best approach to lead a successful retention strategy is to:

Retention efforts yield the highest ROI when aimed at high performers, especially those in critical roles or possessing hard-to-replace skills. Broad retention efforts can dilute impact and cost efficiency.

Extract from HRCI-aligned HR knowledge (Employee Relations and Engagement):

SPHR’s strategic retention model highlights “targeted retention of high-potential and high-performing talent as essential to long-term success.” This includes tailored development and reward strategies for key contributors.