Portfolio
In short
A portfolio is a curated collection of your actual work — projects, designs, writing, or code — that proves your skills more directly than a resume can.
For designers, developers, writers, and marketers, a portfolio is often the deciding factor. Show a few strong, relevant pieces rather than everything, and for each explain the problem, your role, and the result. A clear public portfolio link on your resume makes it easy for remote employers to evaluate you quickly.