This is a type of condition whereby someone thinks or believes there smarter than they actually are.
I don't know if you've ever been in a group of people talking about a particular topic & noticed someone trying to stress his own opinions more just to outsmart all of you.
People with condition tend to 'exagerate' there abilities by thinking they know better than others,yet they have no facts to what they're talking about.
Dunning kruger effect is a type of cognitive bias in which people think there smarter than they actually are.
They also tend to fail to recognize other people's expertise by overestimating there own skills.
How to avoid getting the dunning kruger effect.
1.Keep learning new things
3.Doing proper research on something before talking about it
5.Asking others how you're doing