Two jars of pale powder sit on a kitchen shelf. They look alike, but one contains flour and the other icing sugar. A label allows a cook to identify the contents without opening, tasting or guessing. In other settings, the same simple idea can prevent confusion.
A useful label gives the information needed for a particular job. A seed packet might name the plant and say when to sow it. A museum label might give an object’s name, age and place of origin. Adding every possible detail would make either label difficult to scan quickly.
Position matters as well as wording. A label hidden behind a jar cannot help someone standing in front of the shelf. Small writing may be difficult to read from a distance. Good contrast between letters and background makes the words easier to see.
Labels also need updating. If a box once held pencils but now holds scissors, its old label sends the reader in the wrong direction. A neat design cannot make incorrect information reliable. Checking the contents and changing the words are part of keeping a label useful.