heel is the part behind the toes .. together they are called a foot
No seriously ... The art of making your dog heel: since you have a bulldog, the trick is to walk just fast enough that your dog has to try to keep up with you, that way they can't walk in front .... whooops I said seriously let me try again! Getting your dog to heel: (make sure you have a treat bag in the beginning and that the treats are small and not crunchy you don't want the dog to have to stop to eat the treat) line your dog up where you want them to be and start the walk, you can use the command "lets go" or just start walking (I tend to just start walking) oh it's best if you start out by walking one at a time until they get the hang of what you expect from them .. if your dog starts to pull ahead give a slight tug to the side on the leash and say "utoh" or "atat" and continue walking when your dog falls back in where you want him/her then say "good" and give a little treat keep walking so they understand that walking next to you is what is good, once your baby realizes oh wait you want me here and I get good things when I do it they fall right in with it ... hope that helps!!