Enhancing Salesforce objects with custom fields
Like Salesforce objects, the platform offers standard and custom fields, which are fields that are part of the Salesforce data model, and fields that can be created from scratch on any Salesforce object to increase the amount of data included in a single object, respectively.
Let's see an example by opening the Account page from Setup | Object Manager | Account | Fields & Relationships:
Figure 2.19 – Account fields list
Do you see something strange?
There is a field whose FIELD NAME (or API Name) ends with __c: this is a custom field that has been created by Salesforce on the developer org that you can delete without any problem. There are also other standard fields, which relate to how Salesforce modeled the account object (for example, Source, Addresses, Number, and so on).
Further reading
For a complete list of all available standard fields for standard objects, refer to Salesforce...
