Features vs. benefits
A feature is what it has; a benefit is what changes for the reader. '256-bit encryption' versus 'helps keep your notes private'.
See it
What it is
A feature is what the product has or does. A benefit is what changes for the person reading. '256-bit encryption' is a feature; 'helps protect your notes from unauthorized access' is the benefit. Note how carefully that benefit is worded: 'nobody else can read your notes' would be an overclaim, because confidentiality also depends on key custody, authentication, and whoever has your unlocked laptop. If the real feature is end-to-end encryption, say that and the promise gets stronger honestly. The classic anchors: Theodore Levitt's line that people do not want a quarter-inch drill, they want a quarter-inch hole, and Elmer Wheeler's older 'sell the sizzle, not the steak'.
The mechanical way to get from one to the other is the 'which means' bridge. Write the feature, add 'which means', and keep going until the sentence lands on something the reader feels: 'Offline sync, which means your edits are there when the train goes into the tunnel.' Use it in hero copy, pricing tables, ad headlines, and any place where a stranger decides in three seconds whether to keep reading.
Gotcha: benefit-only copy with no specifics reads as hype, and technical buyers bounce off it. 'Save time' is not a benefit, it is a placeholder for one. Pair the claim with the mechanism (feature plus outcome in the same line), and make sure the outcome is a real consequence of the feature, not a wish taped to it.
Ask AI for it
Turn this feature list into benefit-led copy for [audience]. For each feature, apply the 'which means' bridge until you reach an outcome the reader can feel, then write one line that keeps the feature attached to the outcome. Output a table with three columns: feature, which means, final line (12 words max). Ban vague outcomes like 'save time', 'boost productivity', 'peace of mind' unless you can attach a number or a concrete moment. Do not promise an outcome the feature alone cannot deliver, and flag any feature whose benefit you had to invent rather than derive.