Why are columns important?

Columns are used to break-up and organize content. This item doesn’t mean that you are required to use columns, but when you are using a column layout, you must use the built-in column tool rather than creating the appearance of columns by using tabs or spaces. Screen readers and assistive technology cannot read information in the correct reading order if just tabs or spaces are used. Columns create a structure that screen readers and magnification software can use to read information in the correct order (top to bottom and then left to right).