What is the difference between CI attestation and Data certification?

We have a requirement to get technical teams to audit and validate CIs. However, I can see both CI attestation and Data certification can be used.

Could someone help with understanding what each feature is better suited for? What kinds of scenarios could be used in each and what are the differences?

I understand that data certification allows validation of non-CMDB tables, but it isn't too clear why there is a cross-over between the 2 features. Look forward to your