A dump trailer is versatile and designed for transporting and unloading various materials easily. Common items that can be put in a dump trailer include:

1. Construction Debris: Such as rocks, concrete, bricks, or demolition waste.
   
2. Bulk Aggregates: Like gravel, sand, dirt, or mulch.
   
3. Wood and Brush: Including logs, branches, or tree trimmings.
   
4. Soil and Excavated Material: Ideal for moving soil or other excavated material from construction sites.
   
5. Bulk Trash or Waste: Household or commercial waste that can be disposed of at a landfill.
   
6. Heavy Equipment: In some cases, small to medium-sized construction equipment can be transported using a dump trailer.
   

Always ensure that the dump trailer is rated for the weight and type of material you intend to transport, and adhere to any local regulations or guidelines for disposal of specific materials.