Ethan Brooks has a massive guide on Trends.co on how to grow your newsletter through SEO, advertising, social media, and referrals.
You are going to want to bookmark this for future reference.
► Newsletter Success Launch Plan: 4 Effective Strategies to Kickstart Your Newsletter
► How to Get Your First 5,000 Readers and Engage With Your Audience
► Josh Spector’s Newsletter Growth Tips Playlist