Sessions are pretty arbitrarily defined, all too easily inflated, and far more complex than most realise. It’s possible for apparent step-changes in Google Analytics reports to have little real-world relevance, and common for reports to show numerous mysterious and apparently inexplicable landing pages and traffic sources.
And yet, we put a lot of stock in these concepts - businesses are sold on how many visits their site received in a year. We optimise for conversion rate, a metric calculated using session count. SEOs, ad agencies, consultants and marketing managers can all have targets of a growth in organic sessions. Distilled’s own creative pieces are often judged by clients in terms of how many visits they received. It is therefore essential for Google Analytics users to understand what they’re actually talking about when they reference a “session”, and that’s what this post is all about.