Optimizing Newsletter Performance
A newsletter is a contract of trust. Your CTR is the measure of how well you are fulfilling that contract. Unlike social media, where you're fighting an algorithm, in the inbox, you're fighting for space and attention.
The Trust Factor
Your CTR will naturally increase as subscribers become accustomed to clicking your links and finding high-value content. One 'bad' link (broken, low value, or spammy) can depress your CTR for the next 3 issues.