The following information will be used to construct what is called a Distinguished Name or a DN.

Your certificate signing request should be uniquely identifiable based on your DN.

countryName: Country Name (2 letter code)
stateOrProvinceName: State or Province Name (full name)
localityName: Locality Name (eg, city)
organizationName: Organization Name (eg, company)
organizationalUnitName: Organizational Unit Name (eg, section)
commonName: Common Name (eg, YOUR name)
emailAddress: Email Address
Key strength: