you are advised to use your official email address ( e.g. firstname.lastname@example.org) to gain access and get approved instantly. Free email services like Gmail, yahoo etc. take longer to get approved.
1. Select "Advertiser" if you are a brand/company and need billboards for your own brand/company.
2. Select "Agency" if you are an advertising agency and book billboards on client's behalf.
3. Select "Vendor" if you are OOH media (billboards etc.) provider.