Vertical search is typically a search tool that isolates a user's search to a single entity type, like locations, professionals, or products, or an index-based search that returns links. The user interface of vertical search can vary widely. The best ones adjust the UI depending on the type of entity that the user is searching for.
In Yext Answers
Yext Answers can be built as a vertical search experience so that users can search for only one entity, like doctors, for instance. But it can also be built to support search across many entities with Universal Search.