That is the number of meals/snacks that should be eaten in a day. With that said let me quantify this statement with, these are smaller meals and healthy choices! Eating crap food seven times a day is still crap! You need to eat several meals throughout the day with the most important being Breakfast, do not skip this meal.
When you wake up in the morning, first thing is to down a glass of water, not just eight ounces but sixteen or more and then get ready for the day and have/grab your breakfast before you go.
I have mentioned things like avocado, tomato, and cucumber or grain cereal, that is not processed, like steel cut oats. In a couple of hours you can have a snack like almonds, pecans, carrots, tomato, or bell pepper, just go with easy stuff. Enjoy your lunch, however do not be surprised if you have had a snack or two before lunch. The mid day is usually a tough time so ensure you have healthy choices for snacking and avoid the vending machine, it is all poison! Have a good snack and be flexible, if you have a long day get an extra snack in there so you can make it home for dinner and that your not starving for the commute where you might be tempted to stop for the all-to-easy fast-food! Fast-food is of the devil! It is poison, danger! Look at a previous post about preparing snacks/meals in advance so you have the healthy choices at hand.
Have you drank your gallon of water today? Stay on track you can do it!