Internal traffic can inflate your data and misrepresent normal usage patterns.

The brand you create is the brand worth protecting. Thinking about your brand means thinking about analytics and taking precaution and assessing data accurately. Your site can accrue thousands of hits, so why not exclude an internal i.p. address and receive accurate results?

• Google Analytics Login (admin settings /click All Filters) 

How To: Google's simple instructions - 3 minute setup. 

Reference

• https://support.google.com/analytics/answer
• How To Blog Post: google analytics - build your audience