SSD PERFORMANCE BAD 80% health only

I had purchased NEW SSD model number is : WDC WDS120G2G0A-00JH30 and its health is only 81% can you tell me what’s the reason ?? and how to improve performance for that / can I need to replace this drive ?

How long have you owned your device? Is there a way to perform TRIM on the device?
TRIM Definition (

I hope the definition helps some.

How to Estimate the Remaining Lifespan of Your SSD (