Azotobacter is a free-living nitrogen-fixing biofertilizer that helps improve soil fertility by converting atmospheric nitrogen into forms plants can use. It is also known to produce growth-promoting substances and support better root development.

It may also assist phosphate solubilization and help suppress certain harmful soil pathogens. It is particularly useful in non-leguminous crops such as cereals, vegetables, oilseeds, and fiber crops. Because of these multiple actions, it is often valued not only for nutrient support but also for overall crop vigor. Its practical benefit is stronger plant growth with lower dependence on chemical nitrogen inputs.