A portfolio could be an important addition to your profile as it could increase your desirability and demonstrate your suitability for a specific project. You can use your Portfolio to showcase your previous works and achievements and make yourself and your profile look more competitive and appealing to other Users.
In order to add a Portfolio, you need to go to your User Profile through your User Menu, and click on the Portfolio tab at the top of your page.
Click on the Upload Portfolio button in your Example of Work box.
Fill in all the required fields and then click on the Preview button to see how your post will look. If you are happy, click on Publish.