Limitations of Google Analytics
Google Analytics is a useful tool for gathering information about who is visiting what areas of your site but there are some limitations to web analytics that you should understand.
For many reasons, Google cannot track everything that happens on a web site so any numbers shown on reports should be treated as approximations.
There are two sources of unwanted information which will lead to over-reporting:
- Internal traffic - by default data provided through GCC analytics includes traffic from internal users. This is not necessarily unwanted but if you are interested in the traffic to your pages by the general public, you will need to make arrangements to use the "External Traffic only" view.
- Robots - while the method Google Analytics uses to track user activity will normally exclude most robot activity, it can't guarantee that robot visits will not pollute your reports.
Because we use the free version of Google Analytics we do not get 100% of the traffic does track in every report. You can increase accuracy on some reports but this still does not use all traffic.
Some tracking needs setting up
Google Analytics automatically tracks standard web pages but not things like file downloads and clicks through to external links or to open email programs. These have to be set up and the code injected into the web page. (We use Google Tag Manager to do this but it's a specialist tool for which you need additional training.)
Google Analytics' main problem is its obscure menu system and terminology. They have the Analytics Academy which offers several online courses (some with exams & certificates) and anyone planning to make extensive use of analytics should visit the Academy and at least attempt the beginner's course.
Google also constantly changes things, moving menus, deleting or changing some of the less core dimensions and metrics and even fairly regular users can sometimes get a bit lost. (Who moved my cheese?)