Active voice is action. It's more expressive. Words like "I am" are used. In active voice the speaker performs the action.
In passive voice, broad general statements are used. The speaker is perceived to be speaking at the group. They are not performing the action.
Active- "Kevin hit the ball"
Passive "The ball was thrown by a boy"
In business, active voice is preferred. It is a more direct and engaging way of speaking.