If you dream of yelling and you are doing the yelling, it means you want attention. You did not command attention and interest previously, which was why you started yelling.
The dream symbol of yelling can also mean you were angry, frustrated and your temper was out of control. You may have experienced many emotions during your day and your problems were unresolved. This triggered the dream.
If you dreamed you were being yelled at, it can mean you were the subject of negative attention. Were you at fault? Or were you the victim of unjust targeting, discrimination and unfairness? You should stand up for yourself. Or leave the oppressive situation behind.