You can add all information about yourself and artwork on your profile page by clicking on your avatar then choose "Profile settings".

Can I share my profile page? Will they be able to see it, or do they need to be logged in?

Yes you can, your profile page is public, and your viewers don’t need to log in to view it. It’s easy to share your profile with your connections.

What size should the banner be?

1200 x 200px wide or a ratio of 6:1

What size should my profile image be?

1000 x 1000px or a ratio of 1:1

On my profile page what is a Style Snapshot?

This is where you can upload a range of images that best represent your work. It can be a mixture of art, mockups and client artwork.