No, this slogan isn't a typo, and yes, the English-speaking Nokia reps were extremely embarrassed about it. The best part? The phrase is written everywhere at this booth, from t-shirts to rebranded cans of soup. More idiom-related wackiness post-jump.
The tagline is actually advertising Nokia's "Point and Find" service, which is a sort of user-generated phototagging system. Take a picture of your shoes, or a painting, or whatever, add in a link to its Wikipedia page or shopping link, and then whenever anyone snaps a photo of that item, they'll see your links. The slogan idea is kind of a ripoff of those eBay ads from three years ago that used the tagline "Find Your It". Unfortunately, whoever decided on "TAG YOUR IT" evidently did not go to primary school in an English-speaking country.
The service itself isn't nearly as useful as, say, a barcode scanner, and relying on users to supply those links is sort of cheating in my book, but the service isn't really the point here. The point is that there's a box of macaroni and cheese that says TAG YOUR IT on it.