Writing Unit Tests with Jest

describe('User API', () => {
  it('creates a user', () => {
    // test code
  });
  
  it('updates user details', () => {
    // test code
  });
});

it is faster than test
it is required for API testing
it provides better test descriptions
There is no difference, they are aliases
it and test serve identical purposes but with different semantics: 1) Both are aliases for the same functionality, 2) it enables more readable test descriptions, 3) Commonly used in BDD-style testing, 4) Makes test cases read like sentences, 5) Popular in testing frameworks beyond Jest, 6) Helps write more descriptive tests, 7) Choice between them is purely stylistic, 8) Promotes better test documentation.