Knowing where your website traffic is coming from geographically, can help you fine tune your marketing efforts, measure the success of targeted campaigns, and make informed decisions about online ad buying, like Google AdWords in your internet marketing efforts. If you are a global company, these insights can help you make global decisions about your website like translated content.
Google Analytics can help you better understand your web visitors, and in this case, new visitors versus returning web visitors. It's great that you have web traffic that keeps coming back to your website however growing a new visitor base is critical to the growth of your online business. Keeping an eye on those analytics is important.