When choosing the right bit rate for your content it is important to consider:
The type of content you plan to deliver - fast moving, action-oriented video requires a higher bit rate to avoid visual flaws and artifacting and to improve sound quality.
The type of device receiving the content - screen size and connection speed will affect your bit rate decision.
The quality of the end-user experience - moving to a higher bit rate will increase viewing quality but will also increase file size and cost.
Use this tool to help you choose which bit rate is right for you.