A landing page is usually one long page designed for one goal: newsletter signup, file download, webinar registration or sending an enquiry. Few distractions and a clear call to action (CTA).
It works well in ad campaigns (Google Ads, Facebook): the user clicks the ad and lands on content that matches the offer, instead of a homepage with many links.
A landing can be a separate page within a larger site or a standalone page (e.g. for a specific campaign). What matters: fast load, clear message and one main CTA.
