Adding breadcrumbs to ground beef can be a great way to make your hamburgers juicier, bigger, and crunchier. The breadcrumbs absorb the natural juices during cooking and then return that moisture to the meat as it rests, resulting in a more succulent burger. Furthermore, the breadcrumbs can give the hamburger a nice crunchy texture. However, it is important to note that adding too much salt to the ground beef mixture can make the hamburger sticky, hard, and difficult to cook evenly in the middle.
To ensure that your hamburger stays together, you can add an absorbent ingredient such as breadcrumbs or shredded bread from the pantry. You can also add a touch of sour cream, mayonnaise, cream cheese, yogurt, or a similar agent that helps retain moisture and gives the hamburger a touch of flavor. Varying the combination of ingredients in the panade and incorporating aromatics and spices can add more or less flavor depending on your taste preferences. If you want to try how adding a panade makes a recipe more moist and tender, you can try my recipe for Italian meatballs.
There's nothing wrong with a classic, traditional hamburger, but you could just be eating something really good by adding breadcrumbs to your ground beef.