List building is the process of attracting and converting website visitors, social followers, and prospects into email subscribers. Tactics include opt-in forms, pop-ups, lead magnets, content upgrades, webinars, contests, and referral programs. Quality matters more than quantity — a small engaged list outperforms a large unresponsive one. MisarMail provides embedded forms, landing pages, and a Lead Finder to grow your list from multiple channels.