Negative space is the quieter area around the main subject. It can help an image feel clearer without requiring an empty background or a large block of text.
Find the competing shapes
Shrink your draft and notice which background objects compete with the subject's outline. A lamp, branch, or shelf edge may visually merge with a face or product. Move the crop or simplify that area before adding more effects.
Reserve space intentionally
For a hand-tool demonstration, place the tool and the working hand together, leaving a calm area around the action. If you need text, use that space rather than covering the detail that explains the task.
Check the balance
Empty space should support the message, not force the subject into an awkward corner. Compare two crops at the same display size and ask which one identifies the action faster. Keep enough context to understand the scene, while removing background material that contributes no useful information.