What does it mean to format a phone number?

Phone number formatting simply means that any non-numeric characters are removed from each phone number. This includes parentheses, dashes and even spaces.

Do I have to manually format every phone number in the data?

Whenever the data is loaded into a new project COS will automatically format the list of phone numbers. It is still recommended to check the data for any uncommon characters that COS may not recognize. Uncommon characters can cause issues when trying to load either the data or results.