Google "consent personal information form", its IMM5754 which you can download from IRCC website.I'm submitting documents on IRCC portal. They are asking to provide documents in " Consent Personal Information" & "Additional Documents". Could you please confirm what type of documents I have to provide in these two fields.
Further, I have merged all PDF files but not more than 2MB we can add size.
Additional document i believe is for any extra/supporting documents you would want to upload. You can merge all of them and upload one pdf file.