You’ll want to capture users’ emails regularly, both when they purchase…and even before they become a customer. You can use lead magnets or discounts to incentivize email sign-ups and using an email management service like MailChimp allows you to create triggered autoresponders that will automatically send out pre-made welcome email campaigns when they subscribe.
How much will you make? I think my best month with Google AdSense was almost $5,000 over the last ten years. That amazing month blew my mind since it was actually near the beginning of my blogging journey. When you go from making zero to $5,000 in a month, that will rock your world. For me, it also got me even more excited because I knew there were other ways to monetize.