Diction is an important part of public speaking. Mispronounced words become a distraction and your message can get lost. Effective presenters are mindful of their pronunciation. Certain regionalisms become part of the vernacular, but that doesn't mean it's correct. Inappropriate diction or sloppy speech can rob you of executive presence and impact your professional success.
Listen carefully as you watch this video to see if you make this verbal faux pas: