Learn · email signature glossary
TL;DR
An email signature banner is a horizontal promotional image that sits underneath the contact information in an email signature, usually linked to a landing page. Teams use banners to advertise webinars, product launches, awards, or seasonal offers through email they are already sending. A typical banner is 500 to 600 pixels wide, 100 to 150 pixels tall, and saved as a PNG or JPG under 100 KB so it loads quickly and passes through email gateways without trouble.
Re: In practice
Signature banners convert ordinary correspondence into a quiet marketing channel. A 20-person team sending 40 emails a day each puts a banner in front of roughly 16,000 recipients a month, all people who already interact with the company. That reach costs nothing beyond the design work. The practical risks are worth knowing: oversized images slow message loading and can trip spam filters, and a stale banner promoting last quarter's event looks worse than no banner at all. Keep banners current, keep files small, always link them somewhere useful, and swap them out on a schedule.
Fwd: Worth a look
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