A mockup helps a client or portfolio viewer understand how flat artwork might look on a physical or digital object. Searches such as PSD mockup, packaging mockup, poster mockup, tote bag mockup, ID card mockup and brand mockup are useful only when the scene matches the actual design problem. A dramatic mockup can make a weak presentation look busy, while a simple realistic scene lets typography, colour and logo placement stay easy to judge.
Check the editable area before choosing the file. Some PSD mockups use Smart Objects, while others use masks, perspective transforms or labelled replacement layers. The preview should not be treated as proof that every object is editable. Open the Layers panel and identify the intended artwork surface, background controls, shadows and reflections before building the presentation around it.