The lecture explains how to use Promise.all in JavaScript to handle multiple promises simultaneously. It covers creating promises for Twitter and Instagram profiles, using resolve and reject, and demonstrates how Promise.all can be used to execute these promises together. The timing and execution behavior of Promise.all is discussed, with practical examples and console logs to illustrate the concept.

Explain how promises are created in the provided lecture.

Describe the role of resolve and reject in a promise.

What is the purpose of using Promise.all in JavaScript?

What happens when multiple promises are resolved using Promise.all?

What is the significance of the array passed to Promise.all?

How does the timing of promises affect the output when using Promise.all?

In the context of the lecture, how can you change the order of promises and what effect does it have?