If you're freelancing online, it's important to create a portfolio that displays your skills and what you can offer to clients. With the help of social media platforms, you can promote any type of side hustle. Whether it's offline or online, or whether you're selling a product or offering a service, you can easily set up a page specifically for your side hustle and share posts to online communities. Keep your main profile neat, professional, and relevant to the side hustle you're pursuing.