The small pieces do the heaviest lifting. A subject line has a few words to be honest, specific and interesting. Preview text finishes the thought. The call to action should name the action in plain verbs, such as "Reserve your seat" or "See the schedule," rather than a vague "Learn more."
For every email we provide three subject line options, with preview text, so you can choose or test them. People read on the web by scanning, which is why how people read online shapes our layouts: short paragraphs, descriptive links and one main button.
We also check the small things that trip readers up: a link that does not say where it goes, a sentence that buries the offer, or a button label that could mean two things. These details are cheap to fix on the page and expensive to fix after sending.
If you run A/B tests, send us the results and we will use them. We will not promise any particular open rate or click rate, because your list, your timing and your offer all play a part.