Your dog's nose is amazing. You already know that. You might get frustrated when your dog stops to sniff every blade of grass on your walk. Frustrating as it is, that sniffing is normal, natural, and necessary for your dog.
If your dog sniffs a lot, or tends to follow his nose a lot, you are in luck. There's a sport out there just for your dog. The more "stubborn" your dog is about sniffing, the better he'll be at this sport.