An email with the subject line "Get Your 1,000 Guaranteed Clicks" got almost twice as many opens as the rest of the emails. As a bonus, I got a subscriber to the program I promoted. A tracking system showed that the subscriber came exactly from this site and email.
In 2020, I started using UTM codes for deeper traffic tracking. I won't overwhelm you by explaining UTM tracking in this message. However, we will cover this topic soon, because that way you can know exactly what traffic source got you results.
You can know not only the traffic site, but also what medium is working for you. Banners? Solo Ads or maybe Login Ads? Credit emails or Text ads?
UTM tracking is a cure for tracking blindness. It was another eye-opener for me. One week I got 96 subscribers and 53 out of them come from the link I put in the email body. However, I used the same link on all emails so I could only know people are clicking that link and it is converting well.
Last month, I started using different links on different sites. Look at the excerpt from the Google Analytics report below. (Click to zoom it in)