Meaning of coupon?

[~Song of Joy~]

I have a coupon for Clover leaf tuna. It says "buy 2, save .50"
On the upper right corner it says: "limit ONE coupon per item purchased"

Does that mean I can use a coupon for EACH can of tuna I buy?....or can I only use one coupon per every 2 cans?

thanks for your help

[Mrsb07]

For every 2 cans.

[hollyquaiscer]

means you can use one coupon for every 2 cans you buy.