Visual Language (Art Direction)
Visual language is the agreed set of rules for the kind of images a brand uses: subject matter, perspective, lighting, colour, cropping, and whether and how people appear. It makes a company's photographs and illustrations recognisable even without the logo.
In practice
The most common mistake is a mixture of interchangeable stock photos, old phone snaps and one professional shoot, which looks assembled by accident and undermines even a good layout. For many SMEs, half a day with a photographer on site is worth more than an annual stock subscription, because real rooms, real staff and real products build trust. Record in two or three sentences and a handful of reference images how your pictures should look, so that social posts match too. For photographs of people, agree the intended use in writing beforehand and secure the usage rights for every planned channel. Remember that any image carrying meaning needs alternative text so it remains understandable without sight.