By default, Algolia will index these attributes from the Magento DB. Attributes not included here can be added via the configuration in the Algolia Search > Products > Attribute section.
Customization is advisable if the attribute:
* is not listed in the configuration
* requires on-the-fly data
* has Algolia specific attributes
To help customize or add an attribute specifically for Algolia, please refer to this documentation.
Please note that customization is out-of-scope for Algolia's Support team.