Pay attention to detail during this process. Sometimes the column don't map perfectly to the right variable.
For instance, Apollo has two columns for the name of the company:
1. Company Name for Emails
2. Company Name
The "Company Name" is the full legal name of the company (i.e. NewCo, LLC). The "Company Name for Emails" is the name of the company that you would use in normal conversation (i.e. NewCo).
You will want to map the "Company Name for Emails" column with the "Company" variable in this case.