Why groupthink is not good for the group? Write with example. What are the differences between Divergent and Convergent thinking?

Divergent and Convergent thinking

Read the article in the following link:

• https://hbr.org/2015/11/the-problem-solving-process-that-prevents-groupthink

Why groupthink is not good for the group? Write with example.

What are the differences between Divergent and Convergent thinking?