Microbes are essential for human welfare because they help through various ways in promotion of our health, foods, agro product and reduction of pollution level as well.

These are illustrated below:– 

(a) Microbes are essential for production of diary products like paneer, curd, butter etc. which are processing products of milk. Their production is carried out by the microbes such as bacteria. Similarly bread, idli, vinegar are produced by the activity of microbes. 

(b) By using Mithanogen bacteria, production of biogas is possible. 

(c) Microbes also help us in a treatment of domestic waste water. 

(d) In the field of industries, by activity of microbes we obtain alcoholic drinks of ionous type, organic acids, vitamin B₂ and B₁₂, dextrins, steroid, aminoacids, cyclosporin etc. which all enhances our life.

(e) Microbes are used in the field of treatment against infectious diseases. 

(f) In the field of agriculture, microbes are used to increase production of agriculture. We used microbes as pesticides, weedicides which improve our environmental health. 

(g) Microbes are also used as ‘single cell protein’ which fulfills our protein requirements.