The words you use tell the audience a great deal about you. Is your language colloquial? Is it highly technical? Do you use long, complicated sentences, or short, sharp sentences? Do you use unnecessarily long words?
To a certain extent, your language habits are firmly in place. You might use colloquial phrases without even noticing. For example, you might not even notice that you say ‘yeah’ instead of ‘yes’. The audience might not be so quick to overlook it. The good news is it is never too late to improve your language habits. You can avoid falling into several easily identified traps.