It could be your blog, your landing pages or a resources section. If you have traffic on a subdomain (somewhere.website.com) then you Google Analytics traffic data may be inaccurate. Its counting success as failure and over-counting both users and sessions. This video shows you how to set up a filter to see all the traffic, on subdomains and on your main domain, in one Google Analytics view. It's easy to set up subdomain tracking using a filter. Once done, your data is forever more accurate and insights are easier to find.