ES6 (ECMAScript 2015) introduced many new features that significantly improved JavaScript’s syntax and capabilities.

1. Block-Scoped Declarations
   let and const for block-scoped variables.
   
   2. Template Literals
   String interpolation with backticks
   
   3. Arrow Functions
   Shorter syntax for functions
   
   4. Default Parameters
   Set default values for function arguments
   
   5. Destructuring
   Extract values from arrays or objects.
   
   6. Spread and Rest Operators
   Spread (…): Expands arrays/objects.
   Rest (…): Gathers arguments.