Employer brand is your reputation as a workplace: what people believe about what it is like to work for you, formed long before they ever apply. It is the hiring equivalent of a consumer brand, and like a consumer brand it exists whether or not you manage it, built out of reviews, word of mouth, the experience of past candidates and the way your company shows up in public.
It matters because it quietly shapes every part of hiring. A strong employer brand means more people apply, more of your offers get accepted, and more employees refer their friends, all of which make hiring easier and cheaper. A weak or damaged one has the opposite effect, and you feel it as roles that are strangely hard to fill.
The thing teams often miss is that employer brand is built or eroded at every touchpoint in the hiring process itself, not just in careers-page copy. A clear job description, a fast response, a respectful interview and a kind rejection all add to it. Even candidates you turn down carry an impression away, and they talk. Treating every candidate well is brand work, whether or not you call it that.