Any page a user lands on is considered a landing page. However, landing pages are often tied to ads and search results and are designed to meet specific conversion goals. Not only are they the page a user lands on, but they are also a crucial part of marketing campaigns.
It’s not uncommon for landing pages that are part of a marketing campaign to be designed slightly differently than normal websites. Often, you’ll find that they do not feature a navigation and tend to push a single action, like a download, purchase or registration.