Search feeds · also called keyword block, keyword page, link lander
Keyword lander (keyword block page)
A keyword lander is a landing page made mostly of clickable keyword buttons, each leading to a results page of search ads.
A keyword lander is the stripped-down arbitrage page: a heading, perhaps a line of text, and a block of related search terms presented as buttons. The visitor picks one and is shown a results page of sponsored listings. It is the standard first step of a two-click flow.
The design descends from the parked domain page, which looked much the same. It is efficient because there is nothing else to do on the page, so Lander CTR is high.
That efficiency is also its problem. A page with little or no content offers the visitor nothing but a route to ads. Google's rules for Related Search on Content require sufficient textual content and bar related search units on low-value or ad-heavy pages, which is why Google-fed operations use a content page instead. Bare keyword landers survive mainly on feeds and set-ups whose terms allow them, such as some hosted and domain products.
For advertisers, the bare keyword page is the archetype of the placement they worry about: the visitor chose a keyword from a menu, not from their own need.
Think of it like this
A keyword lander is like a hotel lobby with nothing in it but a row of signposts. It works only if people already know where they want to go.
Related terms
Content page (article lander)
A content page is an article-style landing page that carries related search units, used to monetise visitors through Related Search on Content.
Related search terms
Related search terms are clickable search suggestions shown on a page, each of which opens a results page of ads for that phrase.
Two-click flow
A two-click flow is a monetisation path where the visitor first clicks a keyword and then clicks a search ad, with only the second click earning money.
Parked domain
A parked domain is a registered web address with no developed website, typically showing a placeholder page of ads or links.
Lander CTR (keyword click rate)
Lander CTR is the share of landing-page visitors who click a keyword or related search term, taking them on to the page that shows search ads.
Landing page (lander)
A landing page is the first page a visitor sees after clicking an ad.
Sources: Google AdSense Help: Related search for your content pages