Microorganisms are too small to be seen through naked eyes. However, they are vital to plants and the environment. They play a major role in manufacturing food items at home and in industries.

1. They are used in winemaking, baking, pickling and other food making processes.

2. Alcoholic fermentation by yeast is widely used in the preparation of wine and bread.

3. A bacterium lactobacillus promotes the formation of curd. 

4. Microbes are also useful in preparing many medicines and antibiotics.

You can check the link below:

https://www.youtube.com/watch?v=BifDZpVOxW8&t=908s

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