Click on Settings > Custom Attribute to view a full list of your attributes. To create a new attribute click "New Custom Attribute," and name your Custom Attribute.
After you named your Custom Attribute -- select your "Attribute Type" and click on "Create" to create your Custom Attribute.
Radio: This option allows you to set one value per profile (i.e. Favorite color? Red OR Blue).
Checkbox: This option allows you set more than one value to a single profile.
Text: This option allows you to type a note for remarks about an individual with a free-form text option.
Number: Add a number range to a segment on different ranges.
Tag: This option allows you to set one singular value to your entire data set.
Date: Add a date as an attribute to timestamp your audience.
Date Time: Add a time and date as an attribute to timestamp your audience.