Store Information That’s Unique to Your Organization

Every custom object is classified as either an Enterprise Application object or a Light Application object. The difference between these two categories is that Light Application objects don’t support sharing, access to the Bulk API, or access to the Streaming API.

By default, all custom objects are Enterprise Application objects. To make your custom object a Light Application object, disable Allow Sharing, Allow Bulk API Access, and Allow Streaming API Access on the object’s detail page.

• Manage Custom Objects
  Create, customize, edit, delete, or truncate custom objects to extend the functionality that standard objects, like accounts and contacts, provide.
• Manage Big Objects
  A big object stores and manages massive amounts of data on the Salesforce platform. You can archive data from other objects or bring datasets from outside systems into a big object to get a full view of your customers. From Setup, you can create a custom big object and define its fields and index.
• Object Relationships Overview
  Create relationships to link objects with each other, so that when your users view records, they can also see related data. For example, link a custom object called Bugs to cases to track product defects that are associated with customer cases.
• Custom Object Security
  Learn how security settings work together so you can control access to your custom objects with great flexibility.
• Notes on Enabling Activities for Custom Objects
  Learn about things to consider when enabling activities for custom objects.