: In digital marketing, "missing link text" (or empty anchor text) is an accessibility issue where a link exists but has no descriptive words, making it invisible to screen readers and bad for search rankings [19, 21]. 4. General Idiom

In everyday conversation, a "missing link" is simply the final piece of information or evidence needed to fully understand a situation or solve a problem [5, 8].

: Fossils like Archaeopteryx (linking reptiles and birds) and Tiktaalik (linking fish and land animals) were once celebrated as quintessential missing links [6]. 2. Entertainment & Media