While you can get started with your DesignFiles account you will want to set up a website.
Your website will be one of your main marketing channels to drive in jobs and introduce potential clients to you and your business. It should include:
A page about you and what you have to offer
A page outlining the various services you provide and what's included
Your portfolio - If you are just getting started you can include your best moodboard designs
A contact page with your contact details.
Your DesignFiles account acts more like a client portal where you can invite a client in to discuss and review a project.
It does come with links that you can use to link up your social channels and your website to direct potential clients to your DesignFiles account to either "request a consultation and fill out the questionnaire" or "purchase a design package".
If you currently have clients you can always direct them right to your DesignFiles account to kick start a project with you by emailing them a direct link.