What is the use of using namespace std in cpp?

Question

What does it will do?

Answer 1

Visit this link gfg explained well you will understood much better with examples.

https://www.google.com/amp/s/www.geeksforgeeks.org/namespace-in-c/amp/

Answer 2

https://www.sololearn.com/Discuss/870908/?ref=app
https://www.sololearn.com/Discuss/905774/?ref=app