It is used for both business & personal usage and applicable to environment where there is a chance for the data to get compromised. This will confirm the user name and email address within the certifying authority database. This provides basic level of assurance but not considered as a major significance.
class 2 certificates are also issued for both business and private usage. This will confirm that the information provided by the applicant in the application does not clash with the information in consumer database. This level may have risk of malicious actions and transactions risk. It is generally used for filing IT, ROC & VAT.
class 3 certificate is a high assurance certificate which is mainly intended for e commerce application. It can be used by both individuals as well as organizations. Data threat is high in this level and the consequences of failure of security service is high.