ApexPages

Learn about Salesforce Apex, the strongly typed, object-oriented, multitenant-aware programming language. Use Apex code to run flow and transaction control statements on the Salesforce platform. Apex syntax looks like Java and acts like database stored procedures. Developers can add business logic to most system events, including button clicks, related record updates, and Visualforce pages.

Landing Page Builder / CMS

developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/apex_intro.htm