Do you know why almost all trucks have the message ‘OK TATA’? What does it mean?, Has it any connection with Ratan Tata

Did you ever wonder why ‘OK TATA’ is written on the back of trucks, or what it means? We often see large trucks on the road with these six words—’OK TATA’—on one side. Does it have any connection to the Tata Group, or is it merely a message? Today, we will tell you about this.
A few people know that it is linked to Ratan Tata. The Tata Group manufactures cars, but this message does not appear on the back of cars; it can only be seen on the back of trucks.
The message ‘OK TATA’ on trucks means that the particular truck was manufactured by Tata Group. ‘OK TATA’ means that the truck has passed all quality checks and it is okay to use. 
The message indicates that the truck has been manufactured according to the standards of the Tata Group and that Tata provides a warranty for the vehicle.
Later, the message became a tagline for the brand, even though it was originally written for quality assurance. People are familiar with the message and know where they can see it.
Tata Motors is one of the leading brands that manufactures trucks and cars. Earlier, it was known as Tata Engineering and Locomotive company (TELCO).