Is an ozone machine useful for food? What is the effect?

Is an ozone machine useful for food? What is the effect?

Received a message feedback:

I am using your ozone water machine. Been using it forfour years. The effect has been very good.

Record good news in a timely manner, not to show off.

It encourages us to always improve quality.

With quality comes trust.

Industrial product trust = quality + service

Do you agree?