1

I have read in many places on the Internet that "yeah" is considered unprofessional. And that using "yes" is preferred and considered more formal. What is the reason behind it?

2
6

Because it is informal and colloquial.

yeah adv. Informal Yes.

yeah American English, colloquial, by 1863, from drawling pronunciation of yes.


You can check this similar question as well:

When is it appropriate to use "Yeah" and "Yep" as variants of the word "Yes"?

1

Because "yeah" is an informal and almost lazy way of saying yes. In yeah,you are not pronouncing the word yes correctly.

Not the answer you're looking for? Browse other questions tagged or ask your own question.