Final answer:
If the overall bounce rate average is lower than your website's bounce rate, it may not be necessary to improve your website design.
Step-by-step explanation:
In this question, the subject is Business and the grade level is College.
The question is related to website bounce rates and the need to revisit and improve website design based on the overall bounce rate average.
If the overall bounce rate average of websites in North America is 22% and your website's bounce rate is 18%, then your website's bounce rate is below the average, indicating that your website is performing better than the average website. Therefore, it may not be necessary to revisit and improve your website design.