Session length, part 3
3rd post on the session length report (see part 1 & part 2 ) - there will be a 4th and last one.
Last time, we were analyzing the influence of the landing page for a campaign on the session length report. Here is the distribution we considered. It’s pretty easy to see that when the landing page is a custom page, the initial exit rate is extremely high and the people are churning out fast, after 1 or 2 clicks, maybe 3. Yet, in this example the custom landing page drove higher conversions than its home page rival. Why? Here is an hypothesis: highly targeted landing pages tend to polarize the audience into people very interested and people absolutely not interested. The ones not interested leave instantly. The ones interest have a very high likelihood of ending up buying the product, which explains the higher conversion rate.
Bringing conversion rates into the picture provides further insight. Take a look at this dual distribution: left axis and blue line represent the session length distribution, right axis and green bars represent the conversion rate for a given session length - both charts are for users entering the site via the home page. As expected, since on this site you cannot buy a product in less than 6 clicks, the conversion rate is 0% of any session length <6 page views. Then the conversion rate slowly increases slowly as the session length goes up.
This leads to a key hypothesis: all other things being equal, if you can somehow reduce the number of pages it takes for visitors to get to the product they’re interested in, then you will dramatically increase your conversion rates.
Let’s run some numbers in this example - assuming that we managed to cut the session length by one page (with better site navigation, guided navigation, internal search, etc.) - without impacting the overall user experience on the site. As far as the resulting session length and conversion rate distribution are concerned, you would effectively be shifting the conversion rate distribution by one notch to the left - see here. Using Excel, you can easily compute the incremental orders/revenue which in this case gravitate around 22%. Not too shabby!
This 22%, which again is the incremental orders you would theoretically get by cutting your session length by one page view, can be called the Session Length-Conversion Multiplier. What’s yours?