You can build a large following of targeted people who are also interested in your niche. Put you niche into the search bar on Twitter and check out the results. You will find out who is posting right now. What videos are out there. Who are some of the industry influencers. Questions that people are asking. And even who are some of the competitors.
I wasn’t sharing my affiliate link for ConvertKit (but I am now – I earn a commission if you buy with this link) as this move was happening because I wanted to take a couple of months to really test it out. After using it for more than three months now, however, I’m extremely happy with the results and am confident in my recommendation. Please note that I do receive a commission from the affiliate links to ConvertKit that are on this page. [Full Disclosure: I’m a compensated advisor and an affiliate for ConvertKit.]
Visit forums related to your niche, have a look around them and see what people are talking about. Remember to listen before you speak. Set up your profile. Add value by answering some questions. Engage and if you see a thread where you think you can add value post a reply to that thread. Be sure to observe the rules of the forum or you may get banned.
Finally, you can optionally include “automations” with your broadcast. Automations are a simple way to automatically add or remove tags when your subscribers do certain actions, like open the email or click on specific links. Adding and removing tags are important when creating segments, or subscriber groups, and triggering automated email campaigns.