In each of the categories, you're invited to say and record what you think. Your 'track', can be up to 5 seconds in length and you can 'make tracks' in all categories, or just one (or none even).
You can even make up a category, and then make your opinion heard.
This is where you can add to your profile. You select from a myriad of choices and a collage of your characteristics is assembled. Choose from what you do to how you recreate, what you eat to how you dance, and so on.
You can add an image of you (but only part of you), say your lovely eyebrow, or shoulder, or ankle or perhaps your hairline from the back. Let's keep your full face a mystery. More fun that way.
You like what someone else is saying? Follow them ! Its great to follow and like what is being said out there. You can add your bit to what's being said. Soon, there is a flood of ideas and thoughts poring through. May-be people will follow you too !