Backtick strings (template literals) let you embed expressions with ${}:
let name = "Alice"
let age = 30
let message = `${name} is ${age} years old`
// "Alice is 30 years old"
This is cleaner than concatenation with +. You can put any expression inside ${}:
let price = 10
let qty = 3
console.log(`Total: $${price * qty}`)
// "Total: $30"