What's the application of excavator?

What's the application of excavator?
The excavator has increased the work speed tremendously. It is used extensively in numerous fields, including the following:Excavator Application

Wood removal in forests
Normal grading work and landscaping
Cutting of brushes with attachments
Demolition of structures, and removal of debris
Mining industry
Dredging of rivers
Installation of piles in foundations
Digging of foundations, holes and trenches
Handling of heavy materials
Laying of heavy pipes