The goal of any training is application. Learning only adds value when the new skills and knowledge are used on the job, improving performance. This is what makes training a strategic business investment.
Extract from HRCI-aligned HR knowledge (Learning and Development):
SPHR strategy emphasizes that "learning must lead to behavior change and performance improvement." This is directly connected to Kirkpatrick Level 3 (Behavior) and Level 4 (Results), which evaluate real workplace impact.