The set of channels that reach an audience through digital media. Answer engines are the newest one and break the measurement model the others share, because there is often no click.
Digital Marketing is the set of channels that reach an audience through digital media: organic search, paid search, paid social, organic social, email, display, affiliate and content. Each is measured by cost to acquire and by the volume and quality of what it delivers, and they are planned against each other rather than in isolation.
SEO is the organic search channel, and its economics differ from the paid ones. Cost is front-loaded into production and technical work, traffic accrues slowly, and it does not stop when spend stops. Attribution is correspondingly harder, because the assisting role of an organic visit is usually invisible in a last-click model.
Answer engines are a channel with no click in many sessions. A brand can be named in an answer without a visit, which breaks the measurement model every other digital channel shares. That is why AI visibility is tracked with share of voice, share of citations and mention counts rather than sessions, and why brand authority inside a model has become a measurable target.
