Hi. Sure. I can offer some pointers.

The first thing I look for is the theme/idea and/or colours. For example, I chose a winter-themed profile.

The next thing I look for is showcases. Do they match the profile and its concept/theme and/or colours? I also look at the number of showcases unless stated otherwise in the rating post.

I also look for matching featured badges, avatars/pfps. and avatar frames.

TL:DR: I look for cohesion throughout the page.
If you need some inspiration or a visual example, I suggest looking at the Potw winners or other cool-looking profiles.

For general art guides, you can look at this guide here.

If you need help or have questions, post them in the questions tab or get a quicker response by joining our discord server at: discord.gg/artworkprofiles

Hopefully, I made this clear as I can and hopefully helps you get started.