What is import substitution and how can it affect the nation's economy?

Follow the given link to know the meaning of import substitution.

https://www.meritnation.com/ask-answer/question/what-is-import-substitution/economics/3038471

Follow the given link to know how it can affect nation's economy.

https://www.meritnation.com/ask-answer/question/explain-how-import-substitution-can-protect-domestic-industr/economics/6320126