Why It Exists
A search result is three parts: the address, the blue headline, and a line or two of grey text under it. That grey text is the meta description, written by whoever built the page. When a page has none, Google picks a sentence from the page on its own, and it often picks the wrong one: a menu label, a cookie notice, the first line of the footer.
What It Looks Like
One line in the head of the page, never visible on the page itself.
<meta name="description" content="Soft washing and pressure washing for homes in Blacksburg, Christiansburg, Radford and Pulaski. Siding, roofs, driveways and decks, with the right method for each surface. Free quote by text.">
How To Write One
Between 140 and 160 characters, because Google cuts it off past that. A real sentence a customer would read, not a list of keywords. The towns and the services, since those are what the person searching typed. A soft invitation at the end where it fits: call for a free estimate, book online, open Saturdays. Every page gets its own; a description copied across pages is one Google ignores.
It is worth writing well because it is the one piece of search copy the business controls completely. The ranking decides whether the result appears. The description decides whether it gets chosen over the two above and below it.
What It Does Not Do
It does not move the page up or down. Google said so years ago and has not changed its mind. Stuffing it with keywords gains nothing and reads badly. Its whole job is the click.
How To Check It
Search for the business name and read the grey text under its result. If it is a menu, a date, or a sentence that stops mid-thought, the page has no description and Google is guessing.
See it on a working build: the pressure washing page shows a description written for the click, with the towns and services in it.
The Foundation Connection
The meta description sits with the title tag in the Local Authority layer of the Digital Foundation. The two together are the business card Google hands out on the business's behalf. One is written on purpose; the other is whatever Google found lying around.
