Paying to put your name and face in front of a whole market, repeatedly, until it's familiar.
Quick answer
It builds name recognition, slowly and expensively, and it's hard to measure. Mass media rarely produces a direct inquiry; it makes the other lanes work better because people already know the name when they meet you. It suits established agents or teams with budget to sustain it for a year and other lanes already producing.
Radio spots, local TV, billboards, sponsorship of a local show. You're buying repetition: the same message, the same face, enough times that it sticks. The return arrives through everything else — the open house visitor who says I've heard of you, the referral who already trusts the name.
Money: the highest of any lane, and it needs months of repetition. Time: low once produced. Measurement: hard; use a dedicated phone number or web address per channel.
Mid horizon at best; the value is mostly indirect.
Buying a few weeks of airtime and judging it. Mass media works by repetition; a short run spends the money and skips the result.
If you already have a working business and want the market to know your name, this amplifies it. If you're building from scratch, nearly any other lane returns more per dollar — start with Database and client events or Local search and reviews.
Give each channel its own phone number or web address, and ask every new client how they first heard of you. Indirect lift is real but hard to see, so track what you can.
Agents who want the plan built with them start with PREB Coaching, or build it inside My Home Connection by REAL Broker LLC.