Prep. Place a pizza stone or an inverted baking sheet on the middle rack of your oven. Preheat the oven to 475°F. Allow it to heat for at least 15 minutes to ensure a crispy crust.
Roll out the pizza dough. Lightly flour a clean work surface and your hands. Place the pizza dough on the floured surface. Using your hands or a rolling pin, gently stretch and shape the dough into a 12-inch circle, approximately ¼ inch thick. If the dough resists stretching, let it rest for 5 minutes before continuing.
Transfer to the baking sheet. If using a pizza stone, sprinkle it with a thin layer of cornmeal or dust the baking sheet with flour to prevent the dough from sticking. Then, transfer the shaped dough onto the baking sheet.
Add the Ranch. Spoon ranch dressing onto the center of the pizza dough. Using the back of the spoon, spread the dressing evenly over the surface, leaving a ½-inch border around the edges for the crust.
Layer the toppings. Sprinkle shredded mozzarella cheese evenly over the ranch dressing. Distribute the cooked chicken pieces over the cheese layer. Scatter the crumbled bacon over the chicken.
Bake. Place the pizza in the oven and bake it for 10 to 13 minutes or until the crust is golden brown and the cheese is bubbly and slightly browned.
Finish and serve. Once baked, remove the pizza from the oven and let it cool for 2 to 3 minutes. Drizzle additional ranch dressing over the top, if desired. Garnish with chopped fresh parsley and serve warm.