Final answer:
To make a field 'required' in Salesforce, use the Page layout component.
Step-by-step explanation:
To make a field 'required' in Salesforce, you would use the Page layout component. Page layouts control the organization of fields, sections, and related lists on the Salesforce record detail pages. By marking a field as required in the page layout, users are required to enter data in that field before they can save the record.