A landing page is a web page designed for a single, focused purpose, usually to convert a visitor into a lead or customer, often built as the destination for an ad campaign or a specific marketing message.
It is where ad spend converts or leaks. Sending paid clicks to a generic homepage forces the visitor to hunt for what the ad promised. A landing page delivers it immediately, which is the difference between a wasted click and a lead.
Focus is the whole point. A landing page has one job and removes the distractions that compete with it, so the visitor's attention goes to the single action you want.
It also lifts Quality Score. A landing page that closely matches the ad that sent the visitor improves Quality Score, which lowers the cost of every click in that campaign.
A law firm runs an ad for free will consultations but sends the clicks to its homepage. Visitors land on a general page, see practice areas, partner bios and news, and many leave without finding the offer.
The firm builds a dedicated landing page: the will consultation offer, why it matters, what happens next, and one clear form. Nothing else.
The same ad spend now converts far more visitors, because the page they reach is about exactly the thing the ad promised.
In-House builds focused landing pages for campaigns through the web and advertising agents, so paid clicks reach a page built to convert rather than a general homepage.