1. Pushing and Moving Materials: Bulldozers are designed to push large quantities of soil, sand, rubble, and other construction materials. They are used to move materials over short distances, level surfaces, and prepare land for construction. 

2. Digging and Excavation: Bulldozers can be used for shallow digging and ditching. They can also be used to excavate and remove earth for various construction projects. 

3. Grading and Leveling: Bulldozers are excellent at grading and leveling terrain. They can create smooth surfaces on rough ground, which is crucial for preparing land for foundations, roads, and other infrastructure. 

4. Land Clearing: Bulldozers can be used to clear land by removing trees, stumps, and other obstacles. They can also be used to clear snow in cold climates. 

5. Construction and Road Building: Bulldozers play a vital role in road building and construction by pushing through tough terrain, leveling surfaces, and preparing the ground for various infrastructure projects. 

6. Mining and Quarrying: Bulldozers are also used in mining and quarrying operations for moving rock and debris. 

operate a bulldozer, individuals generally need a high school diploma or equivalent, relevant training, and potentially certifications. Experience with heavy machinery and a strong understanding of safety protocols are also crucial.