What are JavaScript array methods and when should you use them?

Array methods make data pipelines readable. map transforms each item, filter keeps matching items, find returns first match, and reduce folds items into a single value. Picking the right method improves clarity, reduces bugs, and makes review/debug faster.

const activeNames = users
  .filter(u => u.active)
  .map(u => u.name);

const total = cart.reduce((sum, item) => sum + item.price, 0);

Start simple: try this concept in a tiny project before moving to advanced tools.