You'll find three types of columns in Clay: simple columns, special columns and actions.
Simple columns. Simple columns allow you to add various data types into Clay, from text to single/multi-select, numbers to dates, URLs to image URLs, and even checkboxes. You can always change a data type by using the column drop down menu.
Special columns. There are three types of special columns available to help you navigate your data within Clay.
Actions. Actions are API integrations or custom Clay scrapers that you can easily add into any table, apply to your data as a column and extract data from as a whole new column.