Mockups are a great way to showcase your designs or products on Instagram. To create a mockup, you can use various tools such as Photoshop or Canva to design your image. Once you have your design, you can then upload it to a mockup generator website such as Placeit or Smartmockups. These websites allow you to place your design on various mockup templates such as phone cases, t-shirts, or even billboards. Once you have chosen your template, you can then customize it to fit your brand's style and aesthetic. Finally, download your mockup and upload it to Instagram to showcase your design or product in a professional and visually appealing way. Mockups are a great way to give your followers a sneak peek of what's to come and generate excitement around your brand.