Brown the Meat: Place the ground beef in a large skillet or deep saucepan over medium-high heat. Cook, breaking it up with a wooden spoon or spatula into fine crumbles, until it is completely browned and no longer pink (roughly 5–7 minutes). Drain away any excess fat if desired, but leave a tiny bit for flavor.
Prep the Cheese: While the beef cooks, place your Velveeta on a cutting board and slice it into rough 1-inch cubes. Cutting it into smaller pieces is vital—it helps the cheese melt rapidly and evenly without scorching on the bottom of the pan.
Melt & Combine: Reduce the heat to medium-low. Dump the entire can of Rotel tomatoes (including all the rich juices from the can) directly into the pot with the beef. Add the cubed Velveeta cheese.
Stir: Stir the mixture continuously and frequently. As the cheese begins to melt, it will combine with the tomato juices and beef drippings into a glossy, smooth sauce.
Serve Warm: Once the cheese is completely melted and free of lumps, transfer the hot dip to a serving bowl. Set it out immediately alongside a massive basket of salty tortilla chips, corn chips, or pretzels.