How structured snippets work
A structured snippet is a labelled list attached to a search ad. You pick a header from a set Google provides — Services, Types, Brands, Courses, Destinations, Styles, Amenities and similar — and then supply the values that belong under it. It serves as the header, a colon, and the values separated by dots.
The values are plain text and cannot be clicked, so a snippet earns no clicks of its own and costs nothing to serve. You need several values before one is eligible to show, and Google chooses how many appear based on the space available. As with other assets, you can set them at account, campaign or ad group level, and the most specific level in place is the one that serves.
Why structured snippets matter
They answer a question a headline cannot fit: what exactly do you cover? An education consultancy can list the countries it places students in; a trekking operator can list the routes it runs; a workshop can list the makes it services. Someone searching for one specific item in that list can see their answer before clicking.
That works in both directions. The list attracts the people whose need is on it and quietly discourages the people whose need is not, which improves the quality of the clicks you pay for. It also makes the ad taller, and a taller ad with a higher click-through rate is generally a cheaper ad to place.
Common mistakes with structured snippets
The most frequent is treating them as another set of callout assets. Callouts state benefits — free delivery, licensed staff. A structured snippet states membership of a category, and benefits stuffed under a Services header read as noise.
Second is choosing a header that does not match the values, because that is what serves visibly to the searcher. Third is listing things you cannot actually supply, which produces clicks that end in a disappointed enquiry. Fourth is duplication across campaigns: one generic list applied account-wide, when each campaign sells something different and could be far more specific.
How to act on it
Start from what a buyer would scan for and choose the header that names it honestly. Write the values as a customer would say them, not as your internal catalogue names them, and keep each one short enough to read at a glance on a phone.
Give each campaign its own snippet where the offer differs, and keep only the genuinely universal list at account level. Check the values whenever your range changes — a discontinued service left in the list will keep attracting the wrong searches. Reviewed alongside your other ad extensions, snippets are one of the few improvements that raise click quality without adding cost.