The dictionary tells us that an imprint is
Noun: a mark or impression left behind by printing, pressing or stamping.
Verb: to imprint is to leave your mark, either physically or figuratively. Now there’s a verb that speaks to many authors’ motivations.
Little wonder then, that in the publishing world, an imprint is the publisher’s trade or brand name for a specific group of works.
Your imprint name is different to your author name, which is the name you are writing a single book under. It’s also different to your publisher name. Are you confused yet?