Place the shredded chicken in a large mixing bowl. Add the diced avocado, chopped lettuce, halved tomatoes, and shredded cheese. Make sure all ingredients are evenly distributed for the best texture in every bite.
Pour the ranch dressing over the mixture. Season with salt and black pepper according to your preference. Stir gently to combine everything without mashing the avocado too much.
If desired, warm the tortillas for a few seconds in the microwave. This makes them softer and easier to roll. Warm tortillas are also less likely to crack during assembly.
Lay each tortilla flat on a clean surface. Spoon an even amount of filling into the center of each wrap. Avoid overfilling so the wraps stay neatly rolled.
Fold the sides inward first, then roll the tortilla tightly from the bottom up. This helps keep the filling secure and prevents ingredients from spilling out.
Use a sharp knife to cut each wrap diagonally in half. Arrange them on a serving plate and serve immediately for the freshest flavor and texture.