Monitor Your Custom Object and Settings Count in System Overview
Where: This change applies to Lightning Experience and Salesforce Classic in all editions.
Why: Each Salesforce edition has a limit on the number of custom objects that you can create in your org. Beyond the edition limit, a hard limit governs how many custom objects you can install from managed packages, such as apps publicly posted on AppExchange.
How: From Setup, in the Quick Find box, enter System Overview, and then select System Overview.
Your Custom Objects + Your Custom Settings shows the number of active custom objects and settings created by you and users in your org.
Total Custom Objects + Total Custom Settings shows the number of active and inactive objects in your org, including the objects created by you, created by users in your org, or installed from packages. This number includes soft-deleted custom objects that are still waiting to be hard deleted. For more information about the hard-deletion process, see Delete Custom Objects.