Visual force Pages

- Developers can use Visualforce to create a Visualforce page definition.

- This framework is to build custom user interfaces.

- A page definition consists of two primary elements:

• Visualforce markup
• A Visualforce controller

Reference:

https://trailhead.salesforce.com/content/learn/modules/visualforce_fundamentals

https://developer.salesforce.com/docs/atlas.en-us.pages.meta/pages/pages_intro_what_is_it.htm

Visual:

https://www.youtube.com/watch?v=tkcX47-b2Ow