A landing page refers to any Web page that a user arrives at after clicking a hyperlink. The definition of landing page has changed from being synonymous with a website’s home page to referring to any page within a website that is linked to from another location on the Web. A landing page is usually a stable URL that is indexed by search engines, as opposed to a temporary splash or jump pages that are used to move traffic to a site for marketing purposes.
Techopedia explains Landing Page
Like many early World Wide Web terms, the definition of landing page has strayed from its original meaning. Landing pages were once the main focus of marketing efforts, so most websites would maintain a few for various campaigns in addition to a home page. The idea was that the users would come in to the customized landing pages and then click through to the content selected for those pages, or opt-in to an email list or perform whatever action was desired.
Search engines changed things by making any page with relevant content for a particular query into a landing page. This meant that websites had to focus on creating a cohesive feel and spreading any marketing campaigns site-wide, rather than focusing on dressing up a few pages and driving the traffic there.