Certificate attestation is compulsory when you move to another country for various purposes like higher studies, employment, etc. You are required to attest your educational and non-educational documents to prove certificate's genuinity.

WHAT IS CERTIFICATE ATTESTATION:
Certificate attestation is the act of formally certifying the documents to prove the authenticity. It is mainly done for educational documents, marriage certificate, birth-certificate-attestation, and for commercial documents.

NEED FOR CERTIFICATE ATTESTATION:
Certificate attestation is mandatory requirement for migrating to other countries for employment or for the purpose of higher studies. You need to produce the certificates in foreign countries for the purpose of verification. These documents are verified to check its authenticity. For that purpose, you need to attest these documents from the embassy of the migrating country in your home country.