Apex on its own is a powerful tool to extend the Salesforce1 Platform. It allows you to define your own database logic and fully customize the behavior of the platform. Sometimes, controlling what happens behind the scenes isn't enough. You might have a complex process that needs to step users through a wizard or need to present data in a format that isn't native to the Salesforce1 Platform, or maybe even make things look like your corporate website. Anytime you need to go beyond custom logic and implement a custom interface, you can turn to Visualforce.

Visualforce is the user interface framework for the Salesforce1 Platform. It supports the use of HTML, JavaScript, CSS, and Flash—all of which enable you to build your own custom web pages. These web pages are stored and hosted by the Salesforce1 Platform and can be exposed to just your internal users, your external community users, or publicly to the world.

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