Scale and fit are hard to imagine
Dimensions on a page mean little. A product held in a hand, set on a standard counter, or worn by a person of stated height resolves the question instantly and prevents a large share of returns.
Real environments carry information
An ordinary home shows lighting, surfaces, clutter, and the constraints the product must survive. Buyers read those details as evidence the product works outside a controlled set.
Ownership over time
The strongest content shows the product after use: how it cleans, how it stores, how it looks after a month. Very few brands publish this, which is precisely why it is persuasive when they do.