Case studies are one of the best ways to show your work as well as your process and thinking behind each project, whether you’re applying to work at a design agency or attracting freelance clients.
If you already have a couple high quality projects in your portfolio (work that you’d love to do more of), I’d recommend turning at least three of them into a detailed case study when possible.
Here’s my first case study based off of one of the online design briefs I participated in that you can use as an example and inspiration.