Branding mockups are templates of unified assets like business cards, papers, posters, etc. You use them to present your brand identity design ideas. They show a replica of the final product so your client has a better understanding of your vision.
A Mockup is a full-size model of a design or device. High-quality mockups are very essential for designers to present their branding ideas. PSD Mockup templates are a good solution for presenting your works. (Brand Identity Mockup PSD Free Download)