Lead magnet Defined.
Definition
A lead magnet is a free, useful resource a business offers in exchange for a visitor's email address: a short guide, checklist, template, workbook or sample chapter. Its job is to start a relationship with someone who has a specific problem, so the best ones solve one narrow problem quickly and lead naturally to what the business sells.
Sources checked 20 October 2026.
How it works
A visitor enters their email on a landing page, the resource arrives by download link or email, and they join a list that hears from you afterwards. The giveaway is the easy part; the follow-up is where US law applies. Under the CAN-SPAM Act, each commercial email you send must identify itself as an advertisement, tell people how to opt out, and include a valid physical postal address, and opt-out requests must be honored within 10 business days. The FTC's rule also bars asking for a fee or for anything beyond an email address and preferences to opt out.
An example
A bookkeeper offers a two-page month-end close checklist in exchange for an email address. It is narrow, useful the same day, and it shows how she works. Her follow-up emails offering a paid service carry an unsubscribe link and her business's postal address, and anyone who unsubscribes is off the list within days.
Common mistakes
Making it broad and long, when a reader wanted one answer quickly. Asking for many form fields up front. And treating the list as a license to send anything: commercial emails without an opt-out notice or postal address fall foul of the CAN-SPAM Act, whatever the reader signed up for.
