What it means
Weight is one way to separate a heading, a paragraph and a small label without changing families. Numeric CSS values identify weights, but the same number does not promise the same visual darkness in two different typefaces. A bold style may also adjust spacing and proportions rather than simply thicken every outline.
Use it in practice
Compare weights at their intended size. Use stronger text for meaningful emphasis and keep paragraphs comfortable to read.
Watch out for
Do not use a very light weight for essential small text. Check that the actual font resource contains the weight you request.
