Can someone explain why would a company ask for this: - Please list all current and past job titles that are relevant to this position. and - Please list all

Can someone explain why would a company ask for this: - Please list all current and past job titles that are relevant to this position. and - Please list all current and past companies that you've worked for that are relevant to this position. Specially if you're already uploading your resume? Should I include the names of all the companies I've worked for, again?