Final answer:
To extend the Salesforce app with custom functionality, a programmatic solution using Salesforce's programming language, Apex, is required. This allows for the creation of custom features and automation of processes.
Step-by-step explanation:
To extend the Salesforce app with custom functionality, a programmatic solution is needed. This can be achieved by using Salesforce's proprietary programming language, Apex. With Apex, developers can write custom code to create new features, automate processes, and integrate Salesforce with external systems. One example of custom functionality is creating custom objects and fields within Salesforce to store specific data that is unique to your organization. This allows you to tailor the app to your specific needs. Another example is developing triggers and workflows in Apex to automate certain actions or processes within the app. For instance, you can create a trigger that automatically sends an email notification to a user when a certain event occurs.