Footers are an ideal location for mailing list signup prompts because they appear on every page, providing consistent exposure to the signup option, regardless of where users navigate on the site. This ensures that visitors who have engaged with the content and might be interested in more are reminded to subscribe, no matter their location on the website.

Also, placing the signup prompt in the footer keeps it unobtrusive yet accessible — it doesn't interrupt users' browsing experience but is readily available for those seeking to stay connected. Not to forget, users often scroll to the footer seeking contact information or additional resources, making them more likely to notice and consider the mailing list option at this point.^[1]