A good profile is one that is complete and up to date!
Make sure your artist bio and image is up to date, making the most of this section where you can embed your music videos from YouTube by pasting in the URLs into the About field. You could even create a video profile by recording a video explaining yourself as an artist or your band and telling the world what you're about. You could upload this to YouTube and embed into your profile.
Including social media links and your contact information is very important as it means the Scouts and A&Rs at Universal Music have a better chance of finding you online and getting in contact.