Email marketing is an area where I have had a lot of fun with over the years. It is something which is really exciting as it covers the full scope of digital marketing, from targeting & segmentation, to message testing and through to technical delivery.
As a marketing channel, the results can be massively important – driving both customer engagement and repeat revenue. One of the key steps to continual improvement in this space is increasing email click through rates, and in my experience the obvious element to first optimise is the subject line of the email.
As with any testing – the methodology behind it is simple; Test different subject lines, with the higher performing variant deemed the winner.
Makes sense, right? But where do you start with your subject line variations? Here is a handy way to do that using Google Wonder Wheel which visualises what keywords that people are searching for.
Let’s assume I’m a travel company which with an email going out to my family segment. Hitting up a normal Google search query, but selecting the Wonder Wheel in the view type.
What stands out here is that a destination is returned at this level – along with generic terms – family holidays scotland. This is something worth drilling down, both for subject line testing and for some market research.
From here, we can see two standout terms with adventure holidays scotland and luxury family holidays scotland. Next up would be to craft up some subject lines based on these two themes.
A: Adventure Holidays Scotland
A.1 Scotland: Adventure holidays for your family
A.2 Adventure holidays in Scotland: Bring the family
A.3 The latest family adventure holidays in Scotland
B: Luxury Family Holidays Scotland
B.1 Luxury for less: family holidays in Scotland
B.2 Luxury family holidays in Scotland
B.3 Scotland: Luxury holidays for your family
Once happy, testing can be through a tool or just keeping tabs with a manual method – taking around 5% per subject line (total: 30%) and whichever subject lines drives more clicks is determined as the winner, and then it’s a simple case of pushing that out to the remaining 70% of the list.
There are more in depth methods of doing this, combining Google’s Keyword Tool & Google Trends to help determine possible segments and to have a more confident view of what people are looking for but I’ve found Wonder Wheel a really simple and visual way of doing this – and it’s quick!



