Your customer support is second to none.
Is there anyone to explain this sentence for me?

Thanks in advance. :)

Question

Your customer support is second to none. 
Is there anyone to explain this sentence for me?

Thanks in advance. :)

Answer

second to none=the best ^-^(maybe)

Answer

It means that they provide an excellent service. "Second to none" means "the best" or "number one."

Answer

"2nd to none"--> Literally, it means that there is nothing better because it is number one.  However, in everyday speech it is fairly equivalent to, "really good" or even "the best" or "one of the best."  

It is an expression used to state one's opinion on a subject.

e.g. 
The food there is 2nd to none. (talking about favorite restaurant)
I think the best smartphone is the iphone.  It's 2nd to none.