The Translation: Actuation force is the exact amount of physical weight (measured in grams) required to press a key down far enough for the computer to register it.
Use It In a Sentence: “I type really heavy-handed, so I prefer switches with a high actuation force so I don’t accidentally press the wrong keys.”
Why You Care: If your fingers get tired while typing all day, or if you constantly make typos by barely brushing against a key, your actuation force is wrong. Gamers often want a very light actuation force (like 45 grams) for lightning-fast reflexes, while heavy typists prefer a heavier force (like 65 grams) for accuracy.
Hobby Lingo 