Keyword
A keyword is the word or short phrase somebody types into a search box. For twenty-five years it was the fundamental unit of being found online: people typed fragments, search engines matched those fragments to pages, and an entire industry organised itself around guessing which fragments mattered and placing them well.
Keywords existed because of a limitation. Early search engines could not understand a sentence, so people compressed their questions into the two or three words most likely to work — plumber zurich emergency — and learned to read a list of results rather than expect an answer. It was a shared workaround that lasted long enough to feel like the natural order of things.
The limitation is gone. Systems that read meaning do not need you to guess the fragment, and people asking assistants write whole questions instead. One genuinely useful idea survives from the keyword era: vocabulary matching. If your customers say emergency plumber and your website says rapid-response hydraulic solutions, no amount of understanding bridges a gap that wide.
What does not survive is everything built on top of that idea: density targets, keyword volume as a monthly deliverable, the notion that words are a quantity to be managed rather than a choice to be made once. Aligning your language with your customers' language is an afternoon of honest work. It was mis-sold as a subscription for two decades, and in places still is.
The human translation is to use the words your customers use, because those are the words they will say to a machine. Then write about what you actually do, in ordinary sentences, and stop counting.