The Principal Scientific Adviser to the Government of India is like a teacher for the Indian government. This person is in charge of helping the government to make important decisions about science and technology. The Principal Scientific Adviser talks to other scientists, reads articles, and studies new discoveries to help the government understand what is going on in the world of science.
Whenever the government needs advice on anything related to science, the Principal Scientific Adviser is there to help. For example, if the government wants to build a new kind of technology or medicine, they will first ask the Principal Scientific Adviser what they should do. This person is like a brain that helps the government figure out how to make the best decisions about science.
The Principal Scientific Adviser also takes care of making sure that all of the scientific research that the government is doing is ethical, meaning it's done in a way that's fair to everyone involved. They also work to make sure that scientists in India have the resources they need to do their work, like funding and equipment.
In summary, the Principal Scientific Adviser to the Government of India is like a teacher who helps the government make important decisions about science and technology, makes sure that scientific research is done ethically, and ensures that scientists in India have the resources they need to do their work.