A portfolio is basically a freelancer's shop window. It is where potential clients go to decide if they want to hire you. But a lot of freelancers make the same mistake of filling it with work they are proud of rather than work that shows what they can do for a specific client. Others list too many projects without explaining the thinking behind them, so the viewer sees the result but has no idea what problem was solved. Have you noticed patterns in how freelancers present their portfolios in a way that actually hurts their chances of getting hired?